Since some operations (well, probably most of them) require Cork to manipulate data of other apps, it needs Full Disk Access permissions.
Until now, if Cork didn't have these permissions, it would fail the operaiton and the system would sometimes, and sometimes not, prompt you to grant Cork these permissions.
Coming in the next version is a built-in way to grant Cork these permissions.
Check it out: https://drive.tomoserver.eu/f/a59536d1911c4913b07e/