It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

For some reason when I start game it displays error message (EoCApp.exe - No Disk) saying that it failed to access my empty cardreader.
Whatever button I click it closes popup and starts Divinity normally.

Win 10 x64 (15063.674), cardreader Kingston MobileLite G4
error.png (6 Kb)
Same here, only it's my unmounted mobile phone.
Annoying, but it's not game breaking.