Translation help. "about" version N/A

[RadRocket]

Copied this from Papatita web site but it's not helping me understand why I have an N/A where my App and firmware versions should be. It's been translated from Indonesian. I'm not gonna fly without verifying the versions first.

Firmware version Not Appear (N / A)
Why firmware version does not appear in about application DJI GO?

1. Firmware version will not appear or lettering (N / A) on the application DJI GO on the Android operating system devices, so you can appear GO DJI use version 2.7.0 to be able to know Aircraft and Remote firmware version.
2. Ios can also use to determine the firmware version.

 

[dirkclod]

When you have looked in about you did have your drone powered up right ?

 

[RadRocket]

When you have looked in about you did have your drone powered up right ?

Yes, I'm rolling back the firmware and app. Version. All later Version than 2.7.0 show the version numbers.