1, which is due to the network. When you forget the password of the library, you can reset the password, but when resetting the password, you must keep the device in a networked state, because big data needs to record the changed password, which cannot be changed without networking or in a bad network state.

2. System disorder. In the background of library system, if the password is reset too many times at the same time, the internal data of the system will be disordered. In this case, you can only wait for half an hour and reset after logging in.