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.
# php -- BEGIN cPanel-generated handler, do not edit
# Set the “ea-php82” package as the default “PHP” programming language.
<IfModule mime_module>
AddHandler application/x-httpd-ea-php82___lsphp .php .php8 .phtml
</IfModule>
# php -- END cPanel-generated handler, do not edit