Link crash

Build version: 1.8.3.1
Build date: 1981-01-01 01:01:02
Current date: 2022-03-22 16:10:17
Device: Samsung SM-A035F
OS version: Android 11 (SDK 30)

Stack trace:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.civix.link/com.civix.link.Screen.ReceivingFileScreen}: java.lang.NullPointerException
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3851)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4027)
    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$H.handleMessage(ActivityThread.java:2336)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:247)
    at android.app.ActivityThread.main(ActivityThread.java:8676)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
Caused by: java.lang.NullPointerException
    at com.civix.link.Screen.ReceivingFileScreen.getRoomList(ReceivingFileScreen.kt:307)
    at com.civix.link.Screen.ReceivingFileScreen$initLayout$3.onRefresh(ReceivingFileScreen.kt:295)
    at com.jcodecraeer.xrecyclerview.XRecyclerView.refresh(XRecyclerView.java:274)
    at com.civix.link.Screen.ReceivingFileScreen.initLayout(ReceivingFileScreen.kt:302)
    at com.civix.link.Screen.ReceivingFileScreen.onCreate(ReceivingFileScreen.kt:194)
    at android.app.Activity.performCreate(Activity.java:8215)
    at android.app.Activity.performCreate(Activity.java:8199)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3824)
    ... 11 more

User actions:
2022-03-22 16:03:30: SplashScreen created
2022-03-22 16:03:30: LoginScreen created
2022-03-22 16:03:30: LoginScreen resumed
2022-03-22 16:03:30: SplashScreen destroyed
2022-03-22 16:03:35: LoginScreen paused
2022-03-22 16:03:35: AuthorizationManagementActivity created
2022-03-22 16:03:35: AuthorizationManagementActivity resumed
2022-03-22 16:03:35: AuthorizationManagementActivity paused
2022-03-22 16:04:50: AuthorizationManagementActivity resumed
2022-03-22 16:04:50: AuthorizationManagementActivity paused
2022-03-22 16:04:50: LoginScreen resumed
2022-03-22 16:04:51: AuthorizationManagementActivity destroyed
2022-03-22 16:04:52: LoginScreen paused
2022-03-22 16:04:53: LoginScreen destroyed
2022-03-22 16:10:16: ReceivingFileScreen created