In my initial configuration “allow use of mobile number” was not checked:
Login user with username: Yes
Login user with email: Yes
Login Administrator: Yes
I have updated to 12.18 → 12.19:
Login user with username: No
Login user with email: Yes
Login Administrator: Yes
I have marked “allow to use mobile number”:
Login user with username: No
Login user with email: No
Login Administrator: No
I have updated Python 2.7.17 → 3.7
Login user with username: No
Login user with email: No
Login Administrator: No
I suggest we use the other thread to have all the information grouped together: