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.
No...my fabrik version is 0.1less than final version but joomla is final.Are you running recent Joomla and Fabrik versions?
I can not understand your mean, are you mean my problem is version of fabrik?Yes, the Fabrik log grows, and like any logs, it's up to you to rotate it as required.
It's mostly deprecated warnings.
-- hugh