Do you have a .htaccess file? If so, try renaming it to htaccess.txt
Under normal circumstances should public_html be set to 750 permission (has to do with ownership of the folder), while folders within that one should have 755.Make sure your public_html folder has 755 permissions and the files have 644 permissions.
Any chance of getting the public_html part added to https://x10hosting.com/support/general/error-messages-explained ?Under normal circumstances should public_html be set to 750 permission (has to do with ownership of the folder), while folders within that one should have 755.