ther is an error on DB while imported from old DB:
Couldn't update private forum permissions
DEBUG MODE
SQL Error : 1064 You have an error in your SQL syntax near ' 1)' at line 2
INSERT INTO phpbb4_auth_access (forum_id, group_id, auth_mod) VALUES (4, , 1)
Line : 392
File : admin_ug_auth.php
There is no admin_ug_auth.php file or phpbb4_auth_access table in the default Coppermine install. Are you sure this is a Coppermine question?
this happens when cpg integrated with phpbb
however those files are not coppermine files, but phpBB files. As kegobeer suggested: this is not a coppermine issue.