Strange Xojo2019R2 error (Dialog object)

I was trying to load my webapp toXojo2019R2. I got 2 errors which seem to be strange to me

UploadPage.Name
SaveFileDialogHtml on UploadPage implements the event “Dismissed”, but its superclass SaveFileDialog does not declare such an event.
UploadPage

UpLoadContainer.Name
SaveFileDialogLink on UpLoadContainer implements the event “Dismissed,” but its superclass SaveFileDialog has already implemented the event.
UpLoadContainer

Also, don’t know in what extend this is the cause that by trying to load the same webapp to Xojo2019R2 on MacBook Air, the loading process ends with closing the XoJo2019R2 silently… I have posted the apple bug text report to feedback…

MacBook Air runs Catalina

It might be due to a third-part plug-in…