Hmmm, that's odd that it lets you play for a small amount of time before crashing
Have you recently downloaded any animation packs, markings, or items?
Is it usually in a certain map that this happens?
Do you have any duplicate files (mainly particles, but other duplicates can also cause issues)?
Adding on to what Cookie above me has said, make sure that your FH folder itself, hasn't relocated itself from the appropriate file. Usually during updates, the computer will move the file elsewhere. Make sure that the main folder is in your drive ( i.e for Windows it'll be the C-Drive ).