Whenever I save the custom fields in the backend I get a 500 error "Layout "formresumeuserfield" not found” and it will last until I logout and login again, also, I need to know how to modify the default fields to work for my interests, the custom fields are not enough and need to add ID number for the basic information, and a few dropdown fields for languages and other requirements for in my page, don’t want to screw the php code needlessly so please tell me how to do so.

It's kinda urgent, looking forward to know your answer.