Link crash

Build version: 1.7.8
Build date: 1981-01-01 01:01:02
Current date: 2021-12-17 14:23:03
Device: Vivo 1820
OS version: Android 8.1.0 (SDK 27)

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:2932)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3010)
    at android.app.ActivityThread.-wrap11(Unknown Source:0)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1707)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:192)
    at android.app.ActivityThread.main(ActivityThread.java:6759)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:556)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:875)
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:7147)
    at android.app.Activity.performCreate(Activity.java:7138)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1219)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2885)
    ... 9 more

User actions:
2021-12-17 14:23:02: ReceivingFileScreen created