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
Please see our announcement here.
return $data[join][133][dailysubqa___idsubques][$i];
echo '<pre>'; print_r($data[join][133][dailysubqa___idsubques]);exit;
return (int)$repeatCounter;