I get the message “Full Disk Access Required” every time I start.
I have made the required settings in the Security & Privacy pane. With Script Debugger 7 all is ok.
I have uninstalled all Script Debugger versions and also reset the settings in the terminal:
tccutil reset All com.latenightsw.ScriptDebugger8
Big Sur 11.1 (German)
Script Debugger 8.0 (8A17)
Sorry! After a few reboots the problem is gone!