Itgenfby111: I/O error when ensuring bytes written / access is denied

Bij inloggen via de Sumatra Server komt deze issue terug:
itgenfby111: I/O error when ensuring bytes written. (-2147024891).

itgenclr004: Access to the path ‘/cache/database.invantive.com/home/Invantive/Cache/in/disk/user/###@#####.nl/1h/nl/111111111/ExactOnlineREST_System_SystemDiv-C4795294371F598C.cache’ is denied.

itgenclr004: Permission denied.

De gebruiker kan normaal inloggen.
Wat is hier aan de hand?