amazon-kinesis-video-streams-webrtc-sdk-c: Connection timed out

I successfully compiled on arm64, but am unable to run any of the three samples without a connection timeout.

:~/amazon-kinesis-video-streams-webrtc-sdk-c/build$ AWS_ACCESS_KEY_ID="access" AWS_SECRET_ACCESS_KEY="secret" REGION_NAME="us-west-2" ./kvsWebrtcClientMasterGstSample demo2
[KVS GStreamer Master] Using trickleICE by default
[KVS GStreamer Master] Created signaling channel demo2
[KVS Gstreamer Master] Finished initializing GStreamer
[KVS Gstreamer Master] Streaming video only
[KVS GStreamer Master] KVS WebRTC initialization completed successfully
[KVS GStreamer Master] Signaling client created successfully
[KVS GStreamer Master] Signaling client connection to socket established
[KVS Gstreamer Master] Beginning streaming...check the stream over channel demo2
2020-01-15 00:49:10 DEBUG   iceAgentValidateKvsRtcConfig(): 
	iceLocalCandidateGatheringTimeout: 10000 ms
	iceConnectionCheckTimeout: 10000 ms
	iceCandidateNominationTimeout: 10000 ms
	iceConnectionCheckPollingInterval: 50 ms
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client receive {"messagePayload":"[...snip...]","messageType":"ICE_CANDIDATE","senderClientId":"ik44sfhawixoqeq1zfu"}
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:10 DEBUG   stepIceAgentStateMachine(): Ice agent state changed from ICE_AGENT_STATE_NONE to ICE_AGENT_STATE_NEW.
2020-01-15 00:49:10 INFO    signalingClientSendMessageSync(): Signaling Client Sending Message Sync
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
 {"messagePayload":"[...snip...]","messageType":"ICE_CANDIDATE","senderClientId":"ik44sfhawixoqeq1zfu"}
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:10 DEBUG   stepStateMachine(): State Machine - Current state: 0x0000000000000001, Next state: 0x0000000000000002
2020-01-15 00:49:10 INFO    signalingClientSendMessageSync(): Signaling Client Sending Message Sync
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:10 INFO    signalingClientSendMessageSync(): Signaling Client Sending Message Sync
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:10 INFO    signalingClientSendMessageSync(): Signaling Client Sending Message Sync
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client receive 
2020-01-15 00:49:10 WARN    receiveLwsMessage(): Signaling received an empty message
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client receive 
2020-01-15 00:49:10 WARN    receiveLwsMessage(): Signaling received an empty message
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client receive 
2020-01-15 00:49:10 WARN    receiveLwsMessage(): Signaling received an empty message
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client receive 
2020-01-15 00:49:10 WARN    receiveLwsMessage(): Signaling received an empty message
2020-01-15 00:49:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:20 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:30 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:40 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:49:50 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:50:00 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:50:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:50:20 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:50:30 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:50:40 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:50:50 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:51:00 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:51:10 DEBUG   lwsWssCallbackRoutine(): Client is writable
2020-01-15 00:51:17 WARN    createSocket(): connect() failed with errno Connection timed out
2020-01-15 00:51:17 ERROR   createSocketConnection(): operation returned status code: 0x5800001d
2020-01-15 00:51:17 ERROR   turnConnectionStepState(): operation returned status code: 0x5800001d
2020-01-15 00:51:17 DEBUG   turnConnectionStepState(): TurnConnection state changed from TURN_STATE_NEW to TURN_STATE_FAILED
2020-01-15 00:51:17 ERROR   turnConnectionStart(): operation returned status code: 0x5800001d
2020-01-15 00:51:17 ERROR   executeGatheringIceAgentState(): operation returned status code: 0x5800001d

My device has internet access, definitely reacts to the presence of an available client (such as the browser-viewer on the AWS console), but is never able to send data. The client also never detects a connection.

At first I wondered if it was a firewall issue, but the kvs examples do work on my desktop machine, which is behind the same firewall.

I have also tested that gstreamer is working correctly on my arm64 device, as I can create a regular RTP video stream from it to my desktop (on the same LAN).

Any tips? I am not quite sure how to interpret the console log.

Thanks!