How to fix RuntimeException after the first activity

Hello,

I am an apprentice android developer and have just published a version of my application on the Play Store.
However, my application has a huge bug on the android 7.0 versions

Indeed, the user can launch the application but once the homepage has left the application crash. Thanks to the tool of the Google developers I received many stack traces however I do not understand them and I am unable to solve my problem...

I think this bug is due to too big XML files to display, the XML file that is displayed in the second activity has more than 500 lines of code...
The application concerned is Mod & Glitch available on the play store if you want to test this bug if you have an android 7.0

Code:

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java.lang.RuntimeException: at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2724) at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2789) at android.app.ActivityThread.-wrap12 (ActivityThread.java) at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1527) at android.os.Handler.dispatchMessage (Handler.java:110) at android.os.Looper.loop (Looper.java:203) at android.app.ActivityThread.main (ActivityThread.java:6251) at java.lang.reflect.Method.invoke (Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1063) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:924)

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