I have a typo3 plugin hat works fine in typo3 6.2.31 now I migrate to 7.6.23. I have several problems with jQuery libraries. I often got this error:
Uncaught TypeError: jQuery(...).tablesorter is not a function
Or
Uncaught TypeError: $(...).tablesorter is not a function
The library is loaded correctly. Is there a way to fix this issue? Thanks.