App crash in CategoryDetailsActivity when click on any media

[Prince-kushwaha]

Summary:
In the CategoryDetalis Activity click on any medai (image or video) then App crash

Steps to reproduce:
See in ScreenShot

What did you expect the app to do, and what did you see instead?
App not crash in the CategoryDetails Activity on click on any medai (image,video)

System logs:

java.lang.NullPointerException: Attempt to invoke virtual method 'void androidx.appcompat.app.ActionBar.setDisplayHomeAsUpEnabled(boolean)' on a null object reference
at fr.free.nrw.commons.media.MediaDetailPagerFragment.onCreateView(MediaDetailPagerFragment.java:103)
at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2698)
at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:310)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1185)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1354)
at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1432)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1495)
at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:447)
at androidx.fragment.app.FragmentManager.executeOps(FragmentManager.java:2167)
at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1990)
at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1945)
at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1847)
at androidx.fragment.app.FragmentManager.executePendingTransactions(FragmentManager.java:489)
at fr.free.nrw.commons.category.CategoryDetailsActivity.onMediaClicked(CategoryDetailsActivity.java:122)
at fr.free.nrw.commons.explore.media.PageableMediaFragment$pagedListAdapter$2$1.invoke(PageableMediaFragment.kt:17)
at fr.free.nrw.commons.explore.media.PageableMediaFragment$pagedListAdapter$2$1.invoke(PageableMediaFragment.kt:14)
at fr.free.nrw.commons.explore.media.SearchImagesViewHolder$bind$1.onClick(PagedMediaAdapter.kt:37)

Device and Android version:
Android Device:Redmi y3

Commons app version:
Latest Master

Screen-shots:

Screenrecorder-2021-01-21-09-55-50-1.mp4

Would you like to work on the issue?
YES
Please let us know whether you want to fix the issue by yourself. If not, anyone can get the issue assigned to them.
YES

[Prince-kushwaha]

Can I work on this issue

[madhurgupta10]

@Prince-kushwaha Thanks for reporting the issue, feel free to work on it.

[mrudultora]

@Prince-kushwaha Are you still working on this ? If not, then please inform :-)

[Prince-kushwaha]

@mrudultora I am work on this issue

[mrudultora]

@Prince-kushwaha Okay ;-)

[nicolas-raoul]

I am able to reproduce the crash on latest master.