Regina Hi! Sorry fo the late reply!
Hi,
It's because the project was using the new input system by default.
You can click on the EventSystem game object, and there should be a button in the inspector to fix your events, overwise just remove the event system and add a new one.
I pushed a fix for this today it should available in 2-3 days on the store 😉 thanks for reporting and sorry for the inconvenience!
Anthony