Failed to load resource: the server responded with a status of 400 (Bad Request) , could not get id from the server

[bolahanna44]

i developing cross platform application using ionic 3 so when i add localhost as a server hosting my application in api setting dashboard the application get id with no error but when i launch the application in phone i get the error couldn't get the id from the server so i tried to add any string as mentioned in dashboard when developing android or ios application i still get the same error so how i can solve this problem ????