TG-Lab GUI-interface not loaded in macOS

Under macOS 12.2.1 the TG-Lab Interface isn't visbable:

Other functionalities like the window for "Preferences" or the current session ("Hilfe" > "Authentifizierung") is working.

Tested TG-Lab-Versions:

• 3.3.3
• 3.3.4

Possibly related:

• macOS Update to 12.2.1 (from 12.2)
• Java Update to 17.0.1 on local machine (but it worked before with that version installed)