For running J!5.1 you must https://fabrikar.com/forums/index.php?wiki/update-from-github/ or include the new file manually https://fabrikar.com/forums/index.php?threads/joomla-5-1-and-fabrik-cannot-find-files-error.54473/post-285151 See also Announcements
See Announcement
We are still working on the Joomla update.
Fabrik.getBlock('form_5').formElements.get('fab_cdd_test___city2').setValue('["1438", "1441"]')
var foo = ["1438", "1441"];
Fabrik.getBlock('form_5').formElements.get('fab_cdd_test___city2').setValue(foo);
var foo = [1438, 1441];
setValue()
yourcdd.element.fireEvent('change', new Event.Mock(yourcdd.element, 'change'));