I've always packaged the code for compatibility with multiple craftbukkit revisions within a single jar file, so that users wouldn't have to worry which version of InvSee++ they should download. However, since Spigot 1.17.1 md_5 decided that that he should stop bumping the net.minecraft.server revision numbers, which in the past updated always whenever a new versions of the mappings were used. I had to implement another check to see which names were used by actually fetching the version using some subroutine in de Server. This has worked fine on CraftBukkit, Spigot and Paper, HOWEVER one fork of Paper (*ehem Airplane ehem*) decided not to update their bukkit version, so InvSee++ loaded the wrong module.

This update changes the version checking code slightly to make it more robust. Hopefully this will make it so that InvSee++ loads successfully on all forks of Paper in the future, no matter how poorly maintained they are.

If you're already using InvSee++ 0.10.1 and it is working just fine for you, then there is no need to update now.