Troubleshoot the following:
1. There has been a critical error on this website. Please check your site admin email inbox for instructions.//
DataTables warning: table id=fp-table-exam-student-checker - Ajax error. For more information about this error, please see [login to view URL]
2. Sidebar is now placed centered (down)
3. Add button with hyperlink
Looking for the best yet budget-friendly web developer.