BackupBuddy Stash Live keeps giving Error #5002

I keep getting this error even after trying all things online to solve it:

“Oops, something may have gone wrong (most errors try to fix themselves after a bit of time):

Error #5002: Too many file transfer failures have occurred so stopping transfers. We will automatically try again in 12 hours. Verify there are no remote file transfer problems. Check recently send file logs on Remote Destinations page. Dont want to wait? Pause Files process then select Reset Send Attempts under Advanced Troubleshooting Options. Time since last send file: 3 weken. File: /data/sites/web/bootjesinmechelenbe/www/wp-content/uploads/backupbuddy-restoretmp-2ya6b3xgsi/wp-content/plugins/wpml-string-translation/classes/slug-translation/custom-types/wpml-st-slug-translation-post-custom-types-repository.php.”

It keeps hanging all the time at: ?“CURRENTLY: Sending new & modified files… This may take a while.” While nothing changes