@qgas English is default, at least English is slected if you just press ok in language selector window.
But ok, I'll make it appear only on first start.
Edit : After digging further i found the problem . I had selected "ON" in the Sandbox option in my 2captcha account. This was giving me the error
Now it works
You need to add resource with type "LinesFromFile" which contains email:pass lines. Than use it in any action(Load, input text, etc) with Add resource button http://prnt.sc/cmhqqe