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 are still working on the Joomla update.
You add an override for components\com_fabrik\layouts\form\fabrik-pdf-title.php
great Thank so muchYes, copy
components\com_fabrik\layouts\form\fabrik-pdf-title.php
to
components\com_fabrik\views\details\tmpl\your-PDF-template\layouts\form\fabrik-pdf-title.php
and modify as you need