Haha, i was correct... more issues persist.
I can now compile Hise as a VST3 (hopefully meaning i could export a project as vst3 too)
but the "Cycle inside a single target; building could produce unreliable results" error is NOT going.
Time to do some more digging
Update - I can compile to a standalone application just fine - anything "plugin" related (AU, VST, VST3) Will give me the error mentioned before. Will see what i can do - my last 4am braincell is struggling