Have you managed to fix this. Im facing this issue on mobile safari. When I checked the settings, java script is enabled. But sometimes I still get this confirmation window. Some users also reported this
I've had this happen at random at times before. Even here. I've always assumed it's just vagaries of the internet, sometimes not getting the full js experience.
It turns out the Google Analytics 4 tag was the problem. I connected the new G4 tag in the Universal Analytics settings and that screwed up the javascript on our website. Once I removed the connected G4 data stream the problem was resolved..