Topic on Help talk:Paragraph-based Edit Conflict Interface

When I use this extension on my wiki, i got such errorlog:

VM2235:956  Uncaught TypeError: Cannot read properties of undefined (reading '$ui')
    at RealtimePreview.isScreenWideEnough (<anonymous>:798:893)
    at <anonymous>:793:1381
    at Object.add (<anonymous>:956:537)
    at realtimepreview/init.js (<anonymous>:793:959)
    at runScript (load.php?lang=zh&modules=startup&only=scripts&raw=1&skin=citizen:12:268)
    at Array.<anonymous> (load.php?lang=zh&modules=startup&only=scripts&raw=1&skin=citizen:12:948)
    at flushCssBuffer (load.php?lang=zh&modules=startup&only=scripts&raw=1&skin=citizen:4:956)

That's an error message from the WikiEditor extension. I can't tell how this is related, sorry. Maybe you need to update that extension first? What was on screen when this error appeared?

Thanks for the reply, but this is the only error I saw when the issue occurred, and nothing seems to be happening on my backend (including the Nginx logs).Besides my wikieditor is already up to date.