When asking a technical question, provide enough information for us to help!
Complete description of the problem
Screenshot or the exact text of any error messages
Your Device name and ID
The operating system you're running (Android, Windows, Mac, Linux)
Any other information needed to reproduce the problem....
Providing enough detailed information to reproduce your problem saves everyone time and greatly increases the odds we'll be able to help you with a useful answer.
PS Thanks to PJRC forum for the nice list of tech support do's and don't largely copied here :)