Client stopped backing up

PC is Windows 11 and has been backing up properly for months. Suddenly stopped last week. Server is running on TrueNAS.

Errors
12/04/22 13:17
Error getting file metadata. Errorcode: CANNOT_OPEN_FILE (3)
Errors
12/04/22 13:17
Error getting complete file “vfofNh0Ek0mHJAKCN68s|C/Users/NameRedacted/AppData/Local/Packages/MicrosoftWindows.Client.WebExperience_cw5n1h2txyewy/LocalState/EBWebView/Default/Cache/Cache_Data/data_3” from NameRedacted. Errorcode: BASE_DIR_LOST (7)