Error using ungit using IAP.

[mikhail-khodorovskiy]

The error in the datalab logs:

Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]: {"name":"app","hostname":"a30f38098b7f","pid":108,"level":20,"msg":"reset idle timeout (600s)","time":"2020-04-29T19:29:33.037Z","v":0}
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]: {"name":"app","hostname":"a30f38098b7f","pid":108,"type":"request","level":30,"url":"/serverdata.js","method":"GET","msg":"Received a new request","time":"2020-04-29T19:29:33.037Z","v":0}
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]: {"name":"app","hostname":"a30f38098b7f","pid":108,"level":30,"msg":"Forwarding proxied request to path-specified port 8083","time":"2020-04-29T19:29:33.038Z","v":0}
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]: 2020-04-29T19:29:33.044Z - error: attempt to get mac addr failed, using fake mac. Error: Command failed: ifconfig -a || ip link
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]: /bin/sh: 1: ifconfig: not found
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]: /bin/sh: 1: ip: not found
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]:     at ChildProcess.exithandler (child_process.js:206:12)
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]:     at emitTwo (events.js:106:13)
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]:     at ChildProcess.emit (events.js:191:7)
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]:     at maybeClose (internal/child_process.js:877:16)
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]:     at Process.ChildProcess._handle.onexit (internal/child_process.js:226:5)
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]: {"name":"app","hostname":"a30f38098b7f","pid":108,"type":"request","level":30,"url":"/serverdata.js","method":"GET","status":200,"msg":"","time":"2020-04-29T19:29:33.049Z","v":0}
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]: {"name":"app","hostname":"a30f38098b7f","pid":108,"level":20,"msg":"reset idle timeout (600s)","time":"2020-04-29T19:29:33.475Z","v":0}
Apr 29 19:29:33 hsq-dev-mikhail-datalab docker[1287]: {"name":"app","hostname":"a30f38098b7f","pid":108,"type":"request","level":30,"url":"/js/raven.min.js","method":"GET","msg":"Received a new request","time":"2020-04-29T19:29:33.476Z","v":0}
Ap

Errors in the Chrome browser console at the url http://localhost:9999/_proxy/8083/#/repository?path=/content/datalab/notebooks

The key "" is not recognized and ignored.
VM143:6 GET http://localhost:9999/css/styles.css net::ERR_CONTENT_LENGTH_MISMATCH 200 (OK)
VM146:32 App version: 1.1.0
:9999/_proxy/8083/#/repository?path=/content/datalab/notebooks:1 GET http://localhost:9999/_proxy/8083/ net::ERR_CONTENT_LENGTH_MISMATCH 200 (OK)
DevTools failed to load SourceMap: Could not load content for http://localhost:9999/js/raven.min.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
VM143:52 GET http://localhost:9999/js/ungit.js net::ERR_CONTENT_LENGTH_MISMATCH 200 (OK)
DevTools failed to load SourceMap: Could not parse content for http://localhost:9999/socket.io/socket.io.js.map: Unexpected end of JSON input

Connecting to the datalab via IAP:
gcloud beta compute start-iap-tunnel instance-name 8080 --zone us-west1-b --project project-id --local-host-port=0.0.0.0:999

The datalab source code repository exists and is mounted