Change WordPress user roles and capabilities › Forums › Bug Reports › URL causing HTTP ERROR 500 › Reply To: URL causing HTTP ERROR 500
07/02/2018 at 01:50 #4594
Try to temporally switch Off this option “Force custom post types to use their own capabilities” at the “Settings->User Role Editor” and re-test “Users->User Role Editor”. If it will help, then the error from screenshot is related. This fatal PHP error requires a fix any way though.
What version of Divi do you use? I tested URE Pro with 3.0.98.