Lost human detection

Hi Guys, I have just recharged my outdoor cameras, but on doing so, I seem to have lost the “Human” detection mode seems to have dropped off, and I only get activity when in “all motion” mode. Any clues/tips on how to restore please?

look in the other threads. Lots of users with the same problem.

just found something in another post: try disabling the camera and after that enabling it.
Can be done in the settings of the camera.