Can't connect to Alexa

I have several Wall Plugs connected via Alexa, everything was working yesterady but today none are working. I can login to Alexa app on my phone and use those Wall Plugs, but not from Homey. I tried to reconnect, to reinstall the app but got a network request fail error ( Pairsession_not_found ).
Anyone have the same problem?
How to fix that?