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.
No. Actually the base table structure was modified and I would like to add the new fields to my Fabrik list. When you say "sync", what do you mean? I couldn't find this anywhere in the Fabrik admin.
Thanks again!