The error has been up earlier, but not with a solution.
Now I also have the problem and hope you can help.
On several pages I cannot crop an image in front end. Nothing happens.
In the backend it works fine.
I have changed the template but without luck.
I use Joomla! 3.9.2
Form2Content Pro version 6.17.4
PHP version 7.1.26
In google consol, I get this error:
[Violation] Added non-passive event listener to a scroll-blocking 'touchstart' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952