Cannot add new skins; all skin preview models (new, current, and owned) fail to load

Steps to reproduce the issue:

1. Open the Launcher.

2. Go to the skin page.

3. Observe that the model for the currently equipped skin does not load.

4. Attempt to add a new skin. Observe that its preview model also does not load.

5. Attempt to save the new skin. The operation fails and the error message "Sorry! Something unexpected happened..." appears.

6. Open the edit page for an already owned skin. Observe that its model also does not load.

Expected result:

All skin preview models (for the current skin, new skins, and owned skins in edit mode) should load correctly. Users should be able to preview, edit, and successfully save new skins.

Actual result:

• The preview model for the currently equipped skin does not load.

• The preview model for any new skin does not load.

• Attempting to save a new skin fails with the error: "Sorry! Something unexpected happened..."

• The preview model on the edit page for any already owned skin also does not load.

  As a result, the core functionality of adding or editing skins is completely blocked.