App crashes when I open the app in offline mode and change mode of the app.

Project information

• Repository
  https://github.com/T-Rex96/Easy_xkcd/issues
• Project name:Easy xkcd
• Publisher:

Expected behaviour

When I open the easy xkcd app in offline mode and click on options botton . Then I want to change the mode of the app and click on mode option mode or theme must change.

Actual behaviour

When I open the app in offline mode and click on options botton . Then I click on mode option . After clicking on mode option app crashes.

How to reproduce

• Open the easy xkcd app.
• Click on options botton .
• Then click on change mode option .
• After clicking on mode option app crashes.
• Browser : easy xkcd .
• Version : 6.0.4
• Operating system: 7.1.2

Recording of the bug

This is the link to my github account
Here