Page items to submit & Session state protection: error ‘JSON.parse: unexpected character’ (Firefox) / ‘Uncaught SyntaxError: Unexpected token’ (Chrome)

Inside APEX it’s possible to specify ‘Page Items to Submit’: Within the action of the type ‘Execute PL/SQL-code’ of a dynamic action. Within a region of the type ‘Interactive report’ or ‘Classic Report’. The listed page items will be submitted…