Hi @milena , thank you for posting here. Please review our Posting Guidelines and be sure to upload the logfile from your output workspace.
“Pyro4.errors.CommunicationError: cannot connect to (‘34.44.144.58’, 54321): [Errno 60] Operation timed out”
Sometimes this would indicate a problem with our server, but I have just tested it and the server seems to be running. What is the extent of your Area of Interest? What geographic region does it cover?
For some reason, I can’t run a model without compute regression (predictor table). I inserted data that I have and after that it works.
This is strange. Are there any red 
indicators and messages in the user-interface?
Once we see your logfile we will probably have a better idea of how to help. Thank you,