THE SOLUTION (for me, at least) --------------------------------------------------------------- to ambsibling.sb, cas.cat errors: Cause found: FMM f*#@s up file and directory attributes (probably not setting these at all). Explanation: By default, the game folder (Mass Effect Andromeda in my case) is attributed Read-Only, as it should be. When FMM changes mods, it re-creates it's directories with parent Read flags. Then it tries to write-access files it created with read-only flags, which is denied to obvious reasons. Simplest solution: change the game folder (Mass Effect Andromeda in my case) to not not have read-only flag. The problem will be gone (probably) until you switch mod profiles.