Hello, can you please verify your game files as shown in the link below.
https://support.sega.com/hc/en-gb/articles/19454389352593-How-to-verify-the-integrity-of-Football-Manager-s-files-
Then, clear your cache and preferences folder as shown in the link below.
https://support.sega.com/hc/en-gb/articles/19454208745745-How-to-remove-my-caches-and-or-preferences-folders-in-Football-Manager-