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
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Which of your elements is creating which error message?
Can you create multiple articles with a single element in each?
Are all your element published?Which of your elements is creating which error message?
Sorry, forgot to mention that in post no 16 i had the information of elements creating error:Are all your element published?
I have tracked down error messages to two elements. One is multiselect databasejoin element rendered as multiselect dropdown (element no.1083). This throws the following error:
Notice: Undefined offset: 0 in /home/flexcom1/public_html/plugins/fabrik_element/databasejoin/databasejoin.php on line 1326
...and secord culprit is calc element which throws the rest of the errors. Element no is 823 and the contents is: