On OSX 10.5 (Catalina) a Java bug prompts for permission "Keystroke Receiving/Input Monitoring". You can safely deny this, it's not required.

On MacOSX Mojave and later you are required to grant WazzapMigrator Extractor access to the folder where your iTunes backup is stored. Without such grant, it will not be able to extract your data.

If prompted, kindly add WazzapMigrator Extractor in OSX preferences as shown in the tutorial below:

OSX preferences -> Security & Privacy -> Privacy -> Full Disk Access