App crashes while choosing some menu options on landscape mode

Expected behavior

The app is expected to work perfectly without crashing on any screen mode

Actual behavior

The app crashes whenever I click on show hidden files on screen rotate or landscape mode

How to reproduce

• Download the app from Fdroid

• Run the app

• Click send item, one of the menu icons on the left

• click the 3 dots by the top, rotate the screen and choose show hidden items on landscape mode or screen rotate mode, the app will crash

• Browser: Nitroshare version 0.4.0.39
• Operating system: Android 7.0

Recording Of The Bug