Yeah 1.8.0 is a beta release. Have reinstalled, didn't make a difference. Extensions, I don' t know, how do I check that? The error message pops up before Vortex has launched. Don't know if it matters but i'm on Skyrim AE 1.6.640 with all CC content. SKSE64, Nemesis, Synthesis, SSEEdit, Dyndolod...etc. is installed.