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.
I can't replicate any problem with default_rounded in backend/frontend, form and details view.When I try to enter the form (front or backend) I get this error: Parse error: syntax error, unexpected T_VARIABLE in /home/xxxxxxx/public_html/components/com_fabrik/views/form/tmpl/default_rounded/default.php on line 1
Please fix it !
That was related to the error you were seeing when saving the list (can't remember exactly what the wording was - but its along the lines of Fabrik not being able to set the primary key)But what I really don't understand is - how could the id be set under the list settings and then still not work ?