Error = Check for security permission: admin_allow_new_admin failed.

Your system has one master admin account who has all permissions. if you add additional admin accounts, then these do not have all permissions and the error shows that one of this admin accounts who has less permissions tries to do an action that he is not allowed to do. According to the error, I guess an admin with fewer privileges tried to add another admin account, but only the master admin may do that.

 

Security settings are configured in /usr/local/ispconfig/security/security_settings.ini file.

 

Change the line:

admin_allow_new_admin=superadmin

to

admin_allow_new_admin=yes