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 have resolved the issue with the J! updater and this will be fixed in the next release.
jQuery('.imagedisplayor').load(function() {
var img_src = jQuery(this).prop('src');
jQuery(this).closest('a').removeProp('target').prop({'href':img_src,'download':''});
}).each(function(){
if(this.complete) {
jQuery(this).trigger('load');
}
});