same error with menus. If I disable Yjsg Framework plugin, the I can access the menu items in the admin section but then the template itself will not function.
Please make something in the YJSG Plugin v2.3.2 which happens to be obsolete after latest Joomla update.
The Template I use is Journey, latest version, PHP is 7.
Similar issues with Helix Framework and they are releasing a major update any time now.