My content within all of my pages has disappeared. The website is only displaying the header and footer on each page. When I try to restore the internal page to it's previous version to get the content back I get this error: "Internal Server Error: mb_convert_case() expects parameter 1 to be string, array given". I also cannot add anything to my pages other than Assets. When can I do to get the content back? Any ideas on how to fix the Error I'm getting? Thank you!