Hey,is anyone else having the "int map error:unknown" everytime I opened the app it says that, and I press camera and it crashes.Thanks for any help.  

I think it means your phone is not compatible with the DJI Go App.

You got the error after upgrading the APP, right?
May I know have you installed both DJI GO 4 and the old version?
Do you have a here map software installed on your phone?
It's recommended to change another mobile device which is in DJI compatibility list then check the performance.