Same credentials invalid error

Facing same issue

Tried deleting cache , deleting all data of app and at last event tried uninstalling and re-installed app still same issue 

Whole app is down

I tried to login on a new device that failed with the error shown in above screenshot I also have a device in which I was already logged in but when I try to open any file it gives same error. 
On the app with account already logged in all files and other features are shown but when I click it feature or file it prints above json objects of Invalid Credentials