When using PrismLauncher to check for mod updates, the process fails due to an inability to retrieve metadata for the Medieval Buildings [End Edition] and Medieval Buildings mod. This causes the update checker to abort entirely.

• Steps to Reproduce:

1. Open PrismLauncher.
2. Add the Medieval Buildings [End Edition] mod to a Minecraft instance.
3. Run the mod update checker.
4. Observe the error message indicating failure to fetch metadata.

• Expected Behavior:
  PrismLauncher should successfully retrieve the metadata and proceed with the update check for Medieval Buildings [End Edition].

• Observed Behavior:
  The update checker fails and aborts the process possibly due to missing or inaccessible metadata.

• Additional Information:
  Minecraft Version: 1.21.1
  Mod Version: MC 1.21.X - 1.0.2
  Fabric version: 0.16.9
  PrismLauncher version: 8.0

Thanks for reporting this issue. It works fine for me with Prism Launcher 9.1. I recommend updating to the latest version and giving it another try.