The application crashes when i click on refresh from the server option

Related Information:

https://github.com/securityfirst/Umbrella_android

• Project Name:Umbrella_android

• The submitted issue is here:https://github.com/securityfirst/Umbrella_android/issues/224

Expected behavior:

I expected that the application should not be crash when i click on Refresh from the server option.

Actual behavior:

After configure the application when i click on Refresh server option,the application is you can see in bug vieo proprealy.

How to reproduce:

1.Download the app from playstore and open the app.
2.Then click on team conditions accept.
3.naw click on account man icon and setting option.
4.Then click on refresh from the server
5.Note the Bug.

information

• App version:v1.0.12
• os:Android 6.0.1
• Device:samsung J7
  Recording of the bug
  

My GitHub Account: https://github.com/44asad

Logcat

05-01 20:12:42.147 25932 25932 E AndroidRuntime: FATAL EXCEPTION: main
05-01 20:12:42.147 25932 25932 E AndroidRuntime: Process: org.secfirst.umbrella, PID: 25932
05-01 20:12:42.147 25932 25932 E AndroidRuntime: org.eclipse.jgit.api.errors.RefNotFoundException: Ref master can not be resolved
05-01 20:12:42.147 25932 25932 E AndroidRuntime:   at org.eclipse.jgit.api.CheckoutCommand.call(CheckoutCommand.java:242)
05-01 20:12:42.147 25932 25932 E AndroidRuntime:   at org.secfirst.umbrella.data.disk.TentDao$rebaseBranch$2.invokeSuspend(TentDao.kt:49)
05-01 20:12:42.147 25932 25932 E AndroidRuntime:   at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:32)
05-01 20:12:42.147 25932 25932 E AndroidRuntime:   at kotlinx.coroutines.DispatchedTask$DefaultImpls.run(Dispatched.kt:235)
05-01 20:12:42.147 25932 25932 E AndroidRuntime:   at kotlinx.coroutines.DispatchedContinuation.run(Dispatched.kt:81)
05-01 20:12:42.147 25932 25932 E AndroidRuntime:   at kotlinx.coroutines.scheduling.Task.run(Tasks.kt:94)
05-01 20:12:42.147 25932 25932 E AndroidRuntime:   at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:586)
05-01 20:12:42.147 25932 25932 E AndroidRuntime:   at kotlinx.coroutines.scheduling.CoroutineScheduler.access$runSafely(CoroutineScheduler.kt:60)
05-01 20:12:42.147 25932 25932 E AndroidRuntime:   at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:732)