reviveAsync" is window.reviveAsync .
replace:
by
// refresh the ads (use your data-revive-id) window.reviveAsync.b7c2bd3ff3b3bed3a9daa932a43cc2a8.refresh();
// if your data-revive-id starts with number, access like so //window.reviveAsync['7bc2bd3ff3b3bed3a9daa932a43cc2a8'].refresh();