Apologies for not replying. Our development didn't understand what the problem is, but there were weird communication errors between Windows and the camera some time before the main problem occurred. They didn't seem to affect the software and the camera, but it is very odd and shouldn't happen ...

Any news on this?

Thanks for the quick response. Report sent.

According to the list of supported cameras, the Sony A7R IV is one of them, but I'm unable to get it to work.
I've previously successfully used both Helicon Remote and Focus with a Canon 1000D, but with Sony it's been a challenge.

I've tried connecting the camera with various types of cables (usb-c ...