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.
those aren't the same SUB domainIt jumps to the same domain url as the main site, http://johnwicki.com/index.php/19 from http://www.johnwicki.com/index.php/client-quote