Run the game through skse64_loader.exe rather than the Steam launcher.
maxsulframe.dll does not work in isolation. It relies on a specific version of the Skyrim Script Extender (SKSE64). skyrim maxsulframe.dll error
“False positive from Bitdefender. Added exception, worked perfectly.” – Run the game through skse64_loader
If you recently updated Skyrim (especially the Anniversary Edition updates), older DLL mods will break. skyrim maxsulframe.dll error
“Just deleted the DLL and the mod that needed it. Lost some visual tweaks but game runs fine.” –