`org.reflections` won't work about connector

[Su5eD]

The issue here seems to be caused by the Reflections library trying to open an input stream on the root URL of a jar, which the union file system doesn't support. It could a bug / unimplemented feature, as trying the same on a real directory path works fine.

All resource location URIs in Forge use the union file system by default, so to get it to work you'd need to explicitly pass in one that points to the outer file system.

[Su5eD]

I fixed Forgified Fabric Loader to provide the real file path from the ModOrigin inside the mod container, achieving parity with upstream. You can now use that to get the file URI to pass into reflections. Hopefully that helps.