I recently upgraded from 1.46 to 1.48, nearly at the same time I tried to use coppermine in combination with wordpress.
The second item did not work, the users from wordpress where imported to Coppermine with a user_id of 0.
Since that time new users registering always get a 0 as user_id, and they can´t login after registration.
No problem with existing users or if I give them a user_id manually with phpmyadmin. Anyhow not a nice way on the long run ...
Checking for the registration process I couldn´t find a hint where the user_id is inserted into the database or where the "maximum number of the user_id" is generated or whether there is another solution for my homemade (?) problem.
Set the user_id field to auto_increment using phpmyadmin.
:) worked. Thank you.