Same issue here with myopenhab and the alexa skill. I noticed that i cant get to my OH Dashboard via browser as well while the echo gets a not responding.
I spent yesterday installing a local openhab-cloud instance with the help of @ryandetzel tutorial! Link
Running it that way will make me loose the option to use the official alexa skill, it would be so nice to have the skill also use local openhab-cloud instances 
Anybody out there who got a custom skill running to a private installation of openhab-cloud ? Link