A missing .ff file usually means your language pack is broken. Restoring just one file will likely reveal another missing file error right after (e.g., en_core_mp ).
Steam or Battle.net may verify your files and claim they are intact, but the game still crashes. Manual replacement often fixes this where launchers fail. En-core-pre-gfx.ff Download
Are you getting a in the console when it crashes? Did you backup your original files? A missing
After hours of searching, a fellow user on a modding Discord sent them a secure link to a "pre-compiled graphics shader pack" that contained the missing file. Alex learned a valuable lesson: Backup your original game files before modding. En-core-pre-gfx.ff Download