Compiler Failed, bad unknown type (structure).. but was working before.. Same for whole Redpoint EOS Plugin!?

Hi there…

I stumbled over a Problem, that seems to corrupt my Project…
I use the Redpoint EOS Subsystem and the OnlineSubsystemBlueprints.

Everything worked fine… Created Sessions, joined them… tested inventory and movement…

But… out of nowhere… The System broke…

It doesn´t matter if I want to get a Subsystem of the Plugin in any Type… or define a Variable from or to the Subsystem… after closing and reopening the project, The types got invalid, the Variables got invalid… everything broke…

Short video of what happens:

https://www.youtube.com/watch?v=JiNuflZUFCs&feature=youtu.be

What I tried:
• Delete the whole Plugins and reinstall
• Reinstall UE5.1 … completely…
• Delete all Nodes, belonging to those Plugins… And tried to set them again (see video what happens…)
• FINALLY… cloning the src repo of the plugins into the project, recompile all.

Every step was done by completely deleting the Saved, Binaries, Build, DerivedDataCache and Intermediate… As well by deleting as the *.sln, *.vs, *.idea, *.vsconfig.

Nothing helped yet… I don’t know what to do now… I´m out of ideas…