Jitsi sdk error CRASH

Hello…Im new in android. Im trying to build app using jitsi sdk.
When I build “Build API” app working fine.
But when I generate Signed APK app is crashing.
Could someone help on this ?

this is MainActivity
public class MainActivity extends AppCompatActivity {

Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    btn = findViewById(R.id.button4);
    // Initialize default options for Jitsi Meet conferences.
    URL serverURL;
    try {
        serverURL = new URL("https://meet.jit.si");
    } catch (MalformedURLException e) {
        e.printStackTrace();
        throw new RuntimeException("Invalid server URL!");
    }
    JitsiMeetConferenceOptions defaultOptions
            = new JitsiMeetConferenceOptions.Builder()
            .setServerURL(serverURL)
            .setWelcomePageEnabled(false)
            .build();
    JitsiMeet.setDefaultConferenceOptions(defaultOptions);

}

public void onButtonClick(View view){
    String text1 = "IND-5";
    try {
        if (text1.length() > 0) {
            // Build options object for joining the conference. The SDK will merge the default
            // one we set earlier and this one when joining.
            JitsiMeetConferenceOptions options
                    = new JitsiMeetConferenceOptions.Builder()
                    .setRoom(text1)
                    .build();
            // Launch the new activity with the given options. The launch() method takes care
            // of creating the required Intent and passing the options.
            JitsiMeetActivity.launch(this, options);
        }
    }catch (RuntimeException e){

    }
}

}

THIS IS CRASH LOG


Build fingerprint: ‘xiaomi/vince/vince:8.1.0/OPM1.171019.019/V11.0.2.0.OEGMIXM:user/release-keys’
Revision: ‘0’
ABI: ‘arm64’
pid: 25132, tid: 25162, name: pool-3-thread-1 >>> com.example.videoconference <<<
signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
x0 0000000000000000 x1 000000000000624a x2 0000000000000006 x3 0000000000000008
x4 fefefefefefefeff x5 fefefefefefefeff x6 fefefefefefefeff x7 7f7f7f7f7f7f7f7f
x8 0000000000000083 x9 0b67691a602d7b2d x10 0000000000000000 x11 0000000000000001
x12 ffffffffffffffff x13 ffffffffffffffff x14 ff00000000000000 x15 ffffffffffffffff
x16 000000652ad34fa8 x17 0000007b9cd3b5d8 x18 00000000167ab178 x19 000000000000622c
x20 000000000000624a x21 000000000000001c x22 0000007aff9855f3 x23 0000007b00ef2000
x24 0000007b001007ec x25 0000007b00b46c80 x26 0000000000000000 x27 0000007affafe3c0
x28 0000007b1b878688 x29 0000007b00100420 x30 0000007b9ccf0e38
sp 0000007b001003e0 pc 0000007b9ccf0e54 pstate 0000000060000000

backtrace:
#00 pc 000000000001de54 /system/lib64/libc.so (abort+104)
#01 pc 00000000002030c4 /data/app/com.example.videoconference-yVj0BLeAVX0kGKXCIDpvqw==/lib/arm64/libjingle_peerconnection_so.so
#02 pc 00000000002b8c4c /data/app/com.example.videoconference-yVj0BLeAVX0kGKXCIDpvqw==/lib/arm64/libjingle_peerconnection_so.so
#03 pc 00000000002b6138 /data/app/com.example.videoconference-yVj0BLeAVX0kGKXCIDpvqw==/lib/arm64/libjingle_peerconnection_so.so
#04 pc 00000000001fe3e0 /data/app/com.example.videoconference-yVj0BLeAVX0kGKXCIDpvqw==/lib/arm64/libjingle_peerconnection_so.so (JNI_OnLoad+32)
#05 pc 0000000000301184 /system/lib64/libart.so (art::JavaVMExt::LoadNativeLibrary(JNIEnv*, std::1::basic_string<char, std::1::char_traits, std::1::allocator> const&, _jobject*, _jstring*, std::1::basic_string<char, std::1::char_traits, std::_1::allocator>*)+2652)
#06 pc 0000000000004164 /system/lib64/libopenjdkjvm.so (JVM_NativeLoad+268)
#07 pc 00000000724b0544 /data/dalvik-cache/arm64/system@framework@boot.oat (offset 0xa1a000)