[Bug] scrollbar disappears with your pop-up

Hello
the plugin works perfectly with one big detail for me: when I click on the button, the pop-up opens without problem but my scroll bar of my window disappears. I can no longer navigate my page to click update …. (except when I’m at the top of my page – for that I know the plugin is working perfectly)
If I click on the Cancel button of the pop-up nothing happens either, if I close it ditto nothing comes back.
So it’s really opening the pop-up that’s causing me a problem

I tried all the possible parameters normally in the options, it doesn’t change anything
I tried in Chrome, Firefox, etc … same problem

I am under windows 10.
Wordpress version: 5.7.2
Theme: Enfold
Thanks for your help`