Не запускается приложение. Помогите пожалуйста!

Не запускается приложение, которое делал в Android Studio. Подскажите, где ошибка? Я просто почти ничего не понимаю в языке, делаю школьный проект. И не очень понятно где конкретно ошибка и какой код нужно прикрепить чтоб понятно было.

И вот логи (вроде как. Скажите пожалуйста, если прикрепляю не то):

2021-01-19 18:54:12.832 8914-8914/? I/om.example.qui: Unquickening 12 vdex files!
2021-01-19 18:54:12.834 8914-8914/? W/om.example.qui: Unexpected CPU variant for X86 using defaults: x86
2021-01-19 18:54:13.995 8914-8914/com.example.quiz D/NetworkSecurityConfig: No Network Security Config specified, using platform default
2021-01-19 18:54:13.996 8914-8914/com.example.quiz D/NetworkSecurityConfig: No Network Security Config specified, using platform default
2021-01-19 18:54:14.188 8914-8976/com.example.quiz D/libEGL: loaded /vendor/lib/egl/libEGL_emulation.so
2021-01-19 18:54:14.239 8914-8914/com.example.quiz D/AndroidRuntime: Shutting down VM
2021-01-19 18:54:14.245 8914-8914/com.example.quiz E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.quiz, PID: 8914
    java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.quiz/com.example.quiz.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.pm.ApplicationInfo android.content.Context.getApplicationInfo()' on a null object reference
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3365)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7656)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.pm.ApplicationInfo android.content.Context.getApplicationInfo()' on a null object reference
        at android.content.ContextWrapper.getApplicationInfo(ContextWrapper.java:173)
        at android.view.ContextThemeWrapper.getTheme(ContextThemeWrapper.java:174)
        at android.content.Context.obtainStyledAttributes(Context.java:744)
        at androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:839)
        at androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:806)
        at androidx.appcompat.app.AppCompatDelegateImpl.findViewById(AppCompatDelegateImpl.java:630)
        at androidx.appcompat.app.AppCompatActivity.findViewById(AppCompatActivity.java:223)
        at com.example.quiz.MainActivity.<init>(MainActivity.java:57)
        at java.lang.Class.newInstance(Native Method)
        at android.app.AppComponentFactory.instantiateActivity(AppComponentFactory.java:95)
        at androidx.core.app.CoreComponentFactory.instantiateActivity(CoreComponentFactory.java:45)
        at android.app.Instrumentation.newActivity(Instrumentation.java:1253)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3353)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:223) 
        at android.app.ActivityThread.main(ActivityThread.java:7656) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) 
2021-01-19 18:54:14.377 8914-8976/com.example.quiz D/libEGL: loaded /vendor/lib/egl/libGLESv1_CM_emulation.so
2021-01-19 18:54:14.388 8914-8976/com.example.quiz D/libEGL: loaded /vendor/lib/egl/libGLESv2_emulation.so
2021-01-19 18:54:14.674 8914-8914/? I/Process: Sending signal. PID: 8914 SIG: 9