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Trouble Shooting

UModeler Hub

I cannot sign up.

  • Conflict(409) Error occurs.

    This occurs when the email or Username is already in use by another user. Please try using a different email address or Username.

  • I received an error message saying "An error occurred whil sending the request." while signing up. What does this mean and how can I resolve it?

    This error typically indicates a problem in the communication process between the system sending the request and the server that's supposed to receive it. Common causes include:

    • Network Issues: A poor or unstable internet connection can interrupt the data transmission.

    • Firewall or Security Settings: Sometimes, firewall or security settings might block requests.

    • How to Resolve:

      • Check Your Internet Connection: Ensure that your internet connection is stable.
      • Wait and Retry: Sometimes waiting a few minutes and retrying can resolve the issue if it's related to temporary server overload or downtime.
      • Check System Settings: Ensure that your firewall and security settings are not blocking the request.
      • Contact Support: If the problem persists, reach out to the support team of the service you're using for specific assistance.
      • Support team email :

      Remember, the exact solution might vary depending on the specific context of the error.

  • I haven't received the verification email, and I'm getting a 'Not Acceptable (406)' error message.

    Please check if your antivirus firewall program is running. If it is, please disable this firewall program during the registration process and give it another try.

  • Is it a valid email?

    Only users who receive our service's sent email can use the service. Occasionally, the reception of the email we sent may be blocked by the email service provider.

  • Did the email arrive in the spam folder?

    Please check if the email sent by our service is in the spam folder. Our service no longer sends emails if the user cannot properly receive emails. If the email has arrived in the spam folder, please take action so that it is no longer classified as spam.

I cannot log in.

  • Please check the verification email sent after signing up.

    Are you unable to log in, seeing a page like the one below?

    • Invalid email page screen


      If so, please check whether a verification email has arrived at the email address you used for your account. If you didn't receive it, check your spam folder and complete the verification process.

      If there is no verification email in the spam folder, there's a possibility that it was blocked by your email provider. Please contact the person in charge for help.

  • Please check if your internet connection is stable.

    The login function is available in an environment where internet connection is possible.

  • Check if it is a corporate internet environment or an HTTP Proxy environment.

    In some corporate internet environments, you may need to ask your network administrator to allow access to the domain. However, our service does not yet support HTTP Proxy settings. We plan to support HTTP Proxy settings in the near future.

I cannot download the package.

  • Are you an authenticated user?

    Package downloads are only available to authenticated users. You can download packages only with a login-enabled account.

    If the problem persists, your authentication may have expired. Log out and log in again to verify.

Package download takes too long.

  • You may need to check the quality of your internet service.

    Our service uses a CDN to provide stable package download speeds from the geographically closest server for all countries around the world.

    Typically, download times may be longer due to limitations in user internet bandwidth or speed.

    In this case, please contact your internet service provider.

It seems like I can't access the service.

  • Do you need a corporate internet environment or HTTP Proxy settings?

    In some corporate internet environments, contact your network administrator to access our service. Our service does not currently support HTTP Proxy settings. We plan to support HTTP Proxy in the near future.

The problem still persists.

To help resolve the issue, please send an email inquiry to or contact the UModeler X Discord server issue forum(link).

We will do our best to resolve the issue as soon as possible.

An error occurs during the account creation process, stating “Illegal byte sequence encountered in the input. Parameter name: string”.

It has been determined that this error occurs when non-English characters are included in the following items:

  • Unity Project Path
  • Windows Computer Name (PC or Computer name)

You can check the computer name by entering hostname in the command prompt as shown below. untitled

To change the computer name, you can do so in the Windows Settings panel using the Rename this PC feature. You can open the *Settings panel by pressing the Windows button and typing Settings.

Therefore, please try changing the names of these items to English and then attempt again.

Here is the reference page for this issue.

UModeler X

The Unity editor exited with an error dialog that included a message like this: “Failed to present D3D11 swapchain due to device reset/removed…”


This error has been resolved as of UModeler X version 0.17.3. If you encounter this issue, please update to the latest version of UModeler X.

While using UModeler X, there are occasional instances where the error window below appears and Unity crashes.

This issue is related to GPU processing delays and can occur even when not using UModeler X. Often, upgrading your installed graphics card drivers to the latest version can resolve the problem.

Below is guides for general solutions related to this issue.

Additionally, it tends to occur more frequently with lower hardware specs, such as GPU memory or GPU performance etc.

Currently, we’re striving to resolve this issue, though it’s proving to be very challenging.

If the issue persists, try enabling the Disable GPU Options feature introduced in UModeler X version 0.17.1. You can find this toggle feature in the Debug group of the Preferences window.

Untitled When Disable GPU Options is enabled, it deactivates the GPU Skinning and Use DXGI flip model swapchain for D3D11 properties found in the Player options of the Project Settings window, reducing the likelihood of this error occurring.

Project Settings > Player > GPU Skinning Project Settings > Player > GPU Skinning

Project Setting > Quality > Very Low Projections > Player > Use DXGI flip model swapchain D3D11

Changing the Quality to 'Very Low' in Project Settings can also reduce the likelihood of errors occurring.

The ProBuilder toolbar and the UModeler X toolbar are overlapping.

Starting from UModeler X version 0.14.7, you can change the position of the toolbar.

Here's how to do it

  1. Click on the gear icon in the toolbar.


  2. When the Preferences window opens, go to UModeler X > Display > Toolbar Position and adjust the position. The default anchor position is in the center at the top. If you increase the Y value, you'll see the toolbar moving downwards.


In HDRP and URP scenes, textures appear magenta.

When installing UModeler X in HDRP and URP projects, the default material is set for BuiltIn-RP, which causes the textures of UModeler X objects to appear magenta.

In this case, as shown in the video below, you can resolve this by setting the HDRP or URP default material as the default material in the UModeler X settings under Preferences.

For UModeler X objects that have already been created with magenta textures, please change the material to the HDRP or URP default material using the Material tool.

UModeler X | Modeling Mode


This message typically appears when a game object containing the UModeler X component or the UModeler X component itself is deactivated.

If both the game object and the component are activated but this warning still appears, please check if the installed Zepeto Studio version is 3.2.5 or later. This warning may also occur in projects with version 3.2.4 or earlier installed.

UModeler X | Rigging Mode


Occasionally, when using Rigging mode with the [GPU Skinning] option enabled, a Direct X related error may occur, causing Unity to crash.

To use UModeler X Rigging mode in a stable environment, you can disable the [GPU Skinning] option under [Player → Other Settings] group located in [Edit → Project Settings].

This error is planned to be fixed in the future. Untitled

Upon entering the Rigging Mode, [Set the Root Bone] warning appears.

When you start the rigging mode of a UModeler X object without setting a Root Bone, a warning message appears.

To resolve this issue, either drag the game object that will serve as the root bone from the hierarchy window and drop it into the Root Bone object property field, or click the disk icon on the right to select the root bone object. Untitled

Typically, the root bone object forms a hierarchical structure with multiple sub-bone objects and is often found as a child object of the corresponding game object. Untitled

In Rigging mode, undo/redo for tree bone selection is not properly updated.

In this case, updating occurs when you select another bone and then reselect it.

When entering rigging mode, the message [Rigging bones have been changed. Please proceed with remapping.] is displayed.

There are cases where the registered rigging bone data does not match the actual bone tree data in the hierarchy. In this case, press the [Remap Rigging] button to convert the data to the current bone tree data in the hierarchy. The existing BoneWeight information is automatically converted, as long as there is no damage to the RiggingBone information.

The cases of mismatch include:

  • Change of root bone
  • Deletion of root bone
  • Renaming of root bone
  • Change of root bone position
  • Renaming of existing child bone
  • Deletion of existing child bone
  • Change of existing child bone position
  • Creation of a new child bone

Upon entering the Rigging Mode, [The modifiers have to be collapsed.] warning appears.

Rigging mode cannot be activated when there are modifiers in the modifier stack. Therefore, all modifiers must be collapsed or removed before entering rigging mode.

To preserve the changes made by the modifiers, you need to perform the Collapse Modifier action. Follow these instructions:

  1. Select the top modifier in the Modifier Stack.
  2. Click the Collapse Modifier button. This action collapses all modifiers and applies the changes made by them to the source mesh.


When UModelerizing a SkinnedMeshRenderer, the skinning and skeleton information does not appear correctly.

  • Check if the Root Bone is correctly set up.
  • If the Root Bone is not set and the bone hierarchy is not visible in the Hierarchy window, it means that the bone hierarchy has been optimized in the Animator Component. In this case, you need to perform a Deoptimize process to make the optimized bone structure visible again in the Hierarchy window. Please follow the following procedure.
    • This feature does not operate on Prefab Instances. If it's a Prefab Instance, you should unpack it in the Hierarchy before moving forward. Untitled
    • Execute Deoptimize Transform Hierarchy in the Animator Component that contains the SkinnedMeshRenderer. Untitled
    • Go back to the SkinnedMeshRenderer, ensure that the RootBone is selected as a GameObject that is not null, and then proceed with UModelerizing.

UModeler X | Painting Mode

When entering Painting Mode, the message [At least one face has to be unwrapped using UV Editor to paint] appears.

This warning message appears when there are no unwrapped faces. To paint, at least one or more faces of the model must be unwrapped to UV coordinates using the built-in unwrap group tools in the UV editor.


The link below is a manual page about the Unwrap Group  in the UV editor.

언랩 그룹 링크

Additionally, for basic shapes, make sure the Auto Unwrap Shape option is enabled in the Preferences window. This option is enabled by default. With this option turned on, basic shapes are created with UVs already generated, allowing you to start painting immediately without a separate unwrapping process. Untitled Untitled

UModeler X | AI Texturing

"Server is not responding. Please ensure that the server is running in API mode" error occurs.

The issue is that the above popup appears and the generation process does not proceed.

At this time, open the webui-user.bat file in the Stable Diffusion folder with Notepad.

Enter "--api" in the marked area, save, and then restart to resolve the issue.

"Insecure connection not allowed" error occurs.

This error seems to occur because the WebUI uses the HTTP protocol instead of HTTPS. You can resolve this issue by checking the "Allow downloads over HTTP" option in the Project Settings window.


Starting with Unity 2022.3, there is an option that allows downloads over HTTP regardless of the platform ("Allow downloads over HTTP*"). If you select this option to "Always allowed," the issue above can be resolved.


If the problem persists, please contact us at

I get a 'Torch is not able to use GPU' error when installing Stable Diffusion WebUI.

If you encounter a runtime error like the one below and can't proceed further when installing Stable Diffusion WebUI,

venv "C:\Stable Diffusion web UI\stable-diffusion-webui\venv\Scripts\Python.exe"
Python 3.10.6 (tags/v3.10.6:9c7b4bd, Aug 1 2022, 21:53:49) [MSC v.1932 64 bit (AMD64)]
Version: v1.7.0
Commit hash: cf2772fab0af5573da775e7437e6acdca424f26e
Traceback (most recent call last):
File "C:\Stable Diffusion web UI\stable-diffusion-webui\", line 48, in <module>
File "C:\Stable Diffusion web UI\stable-diffusion-webui\", line 39, in main
File "C:\Stable Diffusion web UI\stable-diffusion-webui\modules\", line 384, in prepare_environment
raise RuntimeError(
**RuntimeError: Torch is not able to use GPU; add --skip-torch-cuda-test to COMMANDLINE_ARGS variable to disable this check**

Try editing the command arguments in the webui-user.bat file by adding “--skip-torch-cuda-test” and then run it again.

  • Find the "webui-user.bat" file.
  • Left click on it and choose "Edit."
  • Look for the line that says "set commandline_args=" and add "--skip-torch-cuda-test" to it (should look like set commandline_args= --skip-torch-cuda-test).

Zepeto Studio

The toolbar icons at the top of the Scene view are not visible.

Please check if the installed Zepeto Studio version is 3.2.5 or later. This issue can occur in projects with version 3.2.4 or earlier installed.

Untitled Please check if the installed Zepeto Studio version is 3.2.5 or later. This issue can occur in projects with version 3.2.4 or earlier installed.

Issues such as VPNs or firewalls can cause failures when importing Zepeto package files uploaded to the CDN.


In such cases, please download and use the same file from the upload below.



I can't create basic shapes with mouse actions in the Scene view, or all the icons in the Inspector window are disabled and unusable.

It's highly likely that this issue occurs when using UModeler X with a project that has Zepeto Studio version 3.2.4 or lower installed.

Please try using UModeler X with a project that has Zepeto Studio version 3.2.5 or higher installed.