After selecting a folder and clicking on the back button, app crashes

Expected behavior

I expect that after choosing a folder and clicking on the "back button" to go back, that the application will start running smoothly

Actual behavior

After choosing a folder and clicking on the "back button" to go back, the app crashes.

How to reproduce

1. Download Password Store from F-droid
2. Launch the application
3. Click on "use local directory"
4. Click on "SD CARD" on the next promt
5. Click on "OK" on the next pop up, allow access to your local files and select a folder
6. After selecting the folder, click on the back button at the top left to go back. The app crashes

• Device: Tecno Camon CX
• Operating system: Android 7
• Application Version: version 1.2.0.75

Recording Of The Bug