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Published modpack creates invalid profile path and fails to launch #6975

Description

@theobabyboss13-cyber

Please confirm the following.

  • I checked the existing issues for duplicate problems
  • I have tried resolving the issue using the support portal
  • I have ensured my Modrinth App installation is up to date

What version of the Modrinth App are you using?

0.17.3

What operating systems are you seeing the problem on?

Windows

Describe the bug

After publishing my modpack on Modrinth, installing it through the Modrinth App creates an invalid profile path. Launching the instance fails with an InvalidPathException or an I/O error because the profile path is incorrect.

The issue only happens with the published modpack. Other instances launch correctly.

Steps to reproduce

  1. Open the Modrinth App.
  2. Install the published modpack.
  3. Click Play.
  4. The game fails to launch and throws an InvalidPathException or an I/O error.

Expected behavior

The Modrinth App should install the modpack correctly, create a valid profile directory, and launch Minecraft without any InvalidPathException or I/O errors.

Additional context

The issue started after publishing my modpack on Modrinth.

The modpack was approved by the moderation team and installs successfully, but launching it fails.

The errors I received include:

  • java.nio.file.InvalidPathException: Illegal char <?>
  • I/O error: The system cannot find the file specified.

I can provide the full log if needed.

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