Error while transcibre using jitsi Jigasi

I am installing and using Jitsi with Jigasi with docker
After following all setup instructions and setting up google credentials fore Real time transcription, When I press + button and join user jitsi_meet_transcribe and call, Jitsi adds transciber user but disconnects it after few seconds with following error:
Transcriber
Transcriber is not properly configured. Contact the service administrators and let them know! I will now leave.

This is the log i get from Jigasi container:

Jigasi 2020-06-22 09:06:38.188 INFO: [45] org.jitsi.jigasi.xmpp.CallControlMucActivator.joinCommonRoom().289 Joining call control room: jigasibrewery@internal-muc.meet.jitsi pps:ProtocolProviderServiceJabberImpl(Jabber:jigasi@auth.meet.jitsi)
Jigasi 2020-06-22 09:06:38.198 SEVERE: [59] impl.protocol.jabber.InfoRetreiver.retrieveDetails().369 Cannot load details for contact jigasi@auth.meet.jitsi : XMPPError: item-not-found - cancel
Jigasi 2020-06-22 09:06:38.266 INFO: [51] impl.protocol.jabber.ChatRoomJabberImpl.joined().1256 jigasibrewery@internal-muc.meet.jitsi/focus has joined the jigasibrewery@internal-muc.meet.jitsi chat room.
Jigasi 2020-06-22 09:06:38.497 INFO: [36] org.jitsi.jigasi.SipGateway.registrationStateChanged().120 REG STATE CHANGE ProtocolProviderServiceSipImpl(SIP:test@sip2sip.info) -> RegistrationStateChangeEvent[ oldState=Unregistered; newState=RegistrationState=Registering; userRequest=false; reasonCode=-1; reason=null]
Jigasi 2020-06-22 09:07:42.692 INFO: [23] org.jitsi.jigasi.SipGateway.registrationStateChanged().120 REG STATE CHANGE ProtocolProviderServiceSipImpl(SIP:test@sip2sip.info) -> RegistrationStateChangeEvent[ oldState=Registering; newState=RegistrationState=Connection Failed; userRequest=false; reasonCode=-1; reason=A timeout occurred while trying to connect to the server.]
Jigasi 2020-06-22 09:07:42.696 INFO: [23] impl.protocol.sip.SipLogger.logInfo().196 Info from the JAIN-SIP stack: the sip stack timer gov.nist.javax.sip.stack.timers.DefaultSipTimer has been stopped
Jigasi 2020-06-22 09:07:43.697 INFO: [23] impl.protocol.sip.SipLogger.logInfo().196 Info from the JAIN-SIP stack: the sip stack timer gov.nist.javax.sip.stack.timers.DefaultSipTimer has been stopped
Jigasi 2020-06-22 09:08:39.762 WARNING: [65] org.jitsi.jigasi.xmpp.CallControl.checkAuthorized().287 Requests are not secured by JID filter!
Jigasi 2020-06-22 09:08:39.764 INFO: [65] org.jitsi.jigasi.xmpp.CallControl.handleDialIq().211 [ctx=15928169197611477729922] Got dial request fromnumber -> jitsi_meet_transcribe room: test@muc.meet.jitsi
Jigasi 2020-06-22 09:08:40.285 INFO: [65] org.jitsi.jigasi.JvbConference.start().430 [ctx=15928169197611477729922] Starting JVB conference room: test@muc.meet.jitsi
Jigasi 2020-06-22 09:08:40.289 INFO: [65] org.jitsi.jigasi.JvbConference.setXmppProvider().561 [ctx=15928169197611477729922] Using ProtocolProviderServiceJabberImpl(Jabber:34fdfcff@meet.jitsi/34fdfcff)
Jigasi 2020-06-22 09:08:40.298 INFO: [69] impl.dns.ParallelResolverImpl.run().573 Sending query for xmpp.meet.jitsi./AAAA to backup resolvers
Jigasi 2020-06-22 09:08:40.407 INFO: [67] impl.protocol.jabber.OperationSetBasicTelephonyJabberImpl.registrationStateChanged().127 Jingle : ON
Jigasi 2020-06-22 09:08:40.409 INFO: [67] org.jitsi.jigasi.JvbConference.registrationStateChanged().612 [ctx=15928169197611477729922] Registering XMPP.
Jigasi 2020-06-22 09:08:40.473 INFO: [67] impl.protocol.jabber.ProtocolProviderServiceJabberImpl.authenticated().2535 Authenticated: false
Jigasi 2020-06-22 09:08:40.482 INFO: [67] org.jitsi.jigasi.JvbConference.joinConferenceRoom().700 [ctx=15928169197611477729922] Joining JVB conference room: test@muc.meet.jitsi
Jigasi 2020-06-22 09:08:40.533 INFO: [73] impl.protocol.jabber.ChatRoomJabberImpl.joined().1256 test@muc.meet.jitsi/focus has joined the test@muc.meet.jitsi chat room.
Jigasi 2020-06-22 09:08:40.543 INFO: [73] impl.protocol.jabber.ChatRoomJabberImpl.joined().1256 test@muc.meet.jitsi/7b1fc39f has joined the test@muc.meet.jitsi chat room.
Jigasi 2020-06-22 09:08:40.548 INFO: [73] impl.protocol.jabber.ChatRoomJabberImpl.joined().1256 test@muc.meet.jitsi/b6e7dd4b has joined the test@muc.meet.jitsi chat room.
Jigasi 2020-06-22 09:08:41.465 INFO: [88] impl.protocol.jabber.IceUdpTransportManager.createIceAgent().346 End gathering harvester within 583 ms
Jigasi 2020-06-22 09:08:43.274 INFO: [88] impl.protocol.jabber.CallPeerMediaHandlerJabberImpl.harvestCandidates().1198 End candidate harvest within 1350 ms
Jigasi 2020-06-22 09:08:43.310 INFO: [88] org.jitsi.jigasi.JvbConference.incomingCallReceived().1077 [ctx=15928169197611477729922] Got invite from focus
Jigasi 2020-06-22 09:08:43.343 WARNING: [88] org.jitsi.jigasi.transcription.GoogleCloudTranscriptionService.log() Google Credentials are not properly set
java.io.IOException: Error reading credential file from environment variable GOOGLE_APPLICATION_CREDENTIALS, value ‘/config/key.json’: Invalid PKCS#8 data.
at com.google.auth.oauth2.DefaultCredentialsProvider.getDefaultCredentialsUnsynchronized(DefaultCredentialsProvider.java:162)
at com.google.auth.oauth2.DefaultCredentialsProvider.getDefaultCredentials(DefaultCredentialsProvider.java:126)
at com.google.auth.oauth2.GoogleCredentials.getApplicationDefault(GoogleCredentials.java:113)
at com.google.auth.oauth2.GoogleCredentials.getApplicationDefault(GoogleCredentials.java:85)
at org.jitsi.jigasi.transcription.GoogleCloudTranscriptionService.isConfiguredProperly(GoogleCloudTranscriptionService.java:302)
at org.jitsi.jigasi.TranscriptionGatewaySession.onConferenceCallStarted(TranscriptionGatewaySession.java:181)
at org.jitsi.jigasi.TranscriptionGatewaySession.onConferenceCallInvited(TranscriptionGatewaySession.java:163)
at org.jitsi.jigasi.JvbConference$JvbCallListener.incomingCallReceived(JvbConference.java:1156)
at net.java.sip.communicator.service.protocol.media.AbstractOperationSetBasicTelephony.fireCallEvent(AbstractOperationSetBasicTelephony.java:208)
at net.java.sip.communicator.service.protocol.media.AbstractOperationSetBasicTelephony.fireCallEvent(AbstractOperationSetBasicTelephony.java:167)
at net.java.sip.communicator.impl.protocol.jabber.CallJabberImpl.processSessionInitiate(CallJabberImpl.java:1135)
at net.java.sip.communicator.impl.protocol.jabber.OperationSetBasicTelephonyJabberImpl$2.run(OperationSetBasicTelephonyJabberImpl.java:1136)
Caused by: java.io.IOException: Invalid PKCS#8 data.
at com.google.auth.oauth2.ServiceAccountCredentials.privateKeyFromPkcs8(ServiceAccountCredentials.java:323)
at com.google.auth.oauth2.ServiceAccountCredentials.fromPkcs8(ServiceAccountCredentials.java:305)
at com.google.auth.oauth2.ServiceAccountCredentials.fromJson(ServiceAccountCredentials.java:183)
at com.google.auth.oauth2.GoogleCredentials.fromStream(GoogleCredentials.java:160)
at com.google.auth.oauth2.DefaultCredentialsProvider.getDefaultCredentialsUnsynchronized(DefaultCredentialsProvider.java:156)
… 11 more
Jigasi 2020-06-22 09:08:43.345 WARNING: [88] org.jitsi.jigasi.TranscriptionGatewaySession.log() TranscriptionService is not properly configured
Jigasi 2020-06-22 09:08:43.356 WARNING: [88] org.jitsi.jigasi.transcription.Transcriber.log() test@muc.meet.jitsi: trying to notify Transcriber for a while it is already stopped
Jigasi 2020-06-22 09:08:43.388 WARNING: [88] org.jitsi.jigasi.transcription.Transcriber.log() test@muc.meet.jitsi: participant with identifier focus left while it did not exist
Jigasi 2020-06-22 09:08:43.388 INFO: [88] org.jitsi.jigasi.JvbConference.memberPresenceChanged().986 [ctx=15928169197611477729922] Member left : OWNER focus@auth.meet.jitsi/focus210658355313289
Jigasi 2020-06-22 09:08:43.388 INFO: [88] org.jitsi.jigasi.JvbConference.memberPresenceChanged().994 [ctx=15928169197611477729922] Focus left! - stopping
Jigasi 2020-06-22 09:08:43.391 SEVERE: [88] org.jitsi.jigasi.JvbConference.stop().491 [ctx=15928169197611477729922] Already stopped !
Jigasi 2020-06-22 09:08:43.392 WARNING: [88] org.jitsi.jigasi.transcription.Transcriber.log() test@muc.meet.jitsi: participant with identifier b6e7dd4b left while it did not exist
Jigasi 2020-06-22 09:08:43.393 INFO: [88] org.jitsi.jigasi.JvbConference.memberPresenceChanged().986 [ctx=15928169197611477729922] Member left : OWNER gi1gzkuvymvm1i_n@meet.jitsi/R30puEWs
Jigasi 2020-06-22 09:08:43.394 WARNING: [88] org.jitsi.jigasi.transcription.Transcriber.log() test@muc.meet.jitsi: participant with identifier 34fdfcff left while it did not exist
Jigasi 2020-06-22 09:08:43.404 INFO: [88] org.jitsi.jigasi.JvbConference.memberPresenceChanged().986 [ctx=15928169197611477729922] Member left : MEMBER 34fdfcff@meet.jitsi
Jigasi 2020-06-22 09:08:43.404 WARNING: [88] org.jitsi.jigasi.transcription.Transcriber.log() test@muc.meet.jitsi: participant with identifier 7b1fc39f left while it did not exist
Jigasi 2020-06-22 09:08:43.405 INFO: [88] org.jitsi.jigasi.JvbConference.memberPresenceChanged().986 [ctx=15928169197611477729922] Member left : MEMBER 4pprf1jfhyv_rlls@meet.jitsi/n2759xOe
Jigasi 2020-06-22 09:08:43.420 WARNING: [88] org.jitsi.jigasi.transcription.Transcriber.log() test@muc.meet.jitsi: trying to stop Transcriber while it is already stopped
Jigasi 2020-06-22 09:08:43.426 INFO: [88] org.jitsi.jigasi.AbstractGateway.notifyCallEnded().128 [ctx=15928169197611477729922] Removed session for call. Sessions:0
Jigasi 2020-06-22 09:08:43.528 INFO: [98] impl.protocol.jabber.OperationSetBasicTelephonyJabberImpl.registrationStateChanged().134 Jingle : OFF
Jigasi 2020-06-22 09:08:43.531 INFO: [98] org.jitsi.jigasi.CallManager$HangupCallThread.run().597 [ctx=15928169197611477729922] Removing account Jabber:34fdfcff@meet.jitsi/34fdfcff
Jigasi 2020-06-22 09:08:43.533 INFO: [98] impl.protocol.jabber.OperationSetBasicTelephonyJabberImpl.registrationStateChanged().134 Jingle : OFF