Cannot sign into DJI on the go 4 app.  Screen just flashes for a second then goes back to home screen.  Trying on a Galaxy Tab S2.  Any ideas?

Try re-installing the App

Any chance of trying it on another device?
As Suren mentioned the only other thing to do is completely delete the APP and re-install it.

Suren Posted at 2018-6-10 07:48
Try re-installing the App

Did that already

B1houdini Posted at 2018-6-10 08:05
Any chance of trying it on another device?
As Suren mentioned the only other thing to do is completely delete the APP and re-install it.

tried on my note 4 with the same results.

SNC415 Posted at 2018-6-10 08:23
Did that already

Do you have an IOS device you could try. I believe a Note 4  is also an Android device.
I found if you don't completely delete the APP before re-installing the problem stays.  

Hi there, I'm Sorry about that, however, may I know if you tried to use the regular mobile data since you tried to use the wifi network on the Samsung note 4?

DJI Gamora Posted at 2018-6-10 12:15
Hi there, I'm Sorry about that, however, may I know if you tried to use the regular mobile data since you tried to use the wifi network on the Samsung note 4?

Yes, the note 4 was on LTE.  The Galaxy Tab is used as a dedicated controller for the Mavic.