Full Disk Access which has been introduced in MacOS Mojave (10.14) is a new privacy control feature that prevents, by default, access to some of the user’s application data like Mail, Messages, Photos, Safari. With this new feature, it now requires installed applications to be given full permission in order to access user's protected files. From previous versions of macOS, once an application is installed, full access is automatically given.

Full Disk Access

This can cause compatibility issues with WFBS-SVC Agent including, but not limited to, crashing and hanging.