The game updated in June 5

[Saramandaaa]

The stracker's loader need to be updated.
Thank you very much!

[Dwyriel]

The loader itself is working, or at least partially working.

Checking around forums it seems that the error message simply states "error mismatch" for the following plugins:
CustomFOV.dll
HealthNotes.dll
MonsterLoader.dll
QuestLoader.dll
RegionalSet.dll

I myself only use HealthNotes and I can attest it's currently not being injected because of said error. Some other plugins seems to still be working, here are some I've tested myself:
CutSceneSkip.dll
UnstickyAim.dll

Update was very small and it doesn't seem like much changed in the binary itself, so probably just the plugins throwing errors because of a mismatch in the internal game/compile version.