"node run_ssltunnel.js ..." encounter error

[briteming]

hi.

node run_ssltunnel.js --role client --proxy_port 54080 --server_port 64443 --server_host my-vps-ip --srv_pub_cert ~/node_modules/ssltunnel/gen-certs/server-public.pem --clt_pub_cert ~/node_modules/ssltunnel/gen-certs/client-public.pem --clt_prv_cert ~/node_modules/ssltunnel/gen-certs/client-private.pem
Running 'client' role. Listening on 54080, encrypting and forwarding to ssltunnel's server on my-vps-ip:64443
ssltunnel's client is listening on port: 54080

Connected to the real BE server
/Users/brite/node_modules/ssltunnel/lib/ssltunnel.js:141
log.info('Error communicating with the server. Error: ' + JSON.stringify(exception));
^

TypeError: Converting circular structure to JSON
--> starting at object with constructor 'Object'
--- property 'issuerCertificate' closes the circle
at JSON.stringify ()
at TLSSocket. (/Users/brite/node_modules/ssltunnel/lib/ssltunnel.js:141:70)
at TLSSocket.emit (events.js:208:15)
at emitErrorNT (internal/streams/destroy.js:91:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:59:3)
at processTicksAndRejections (internal/process/task_queues.js:77:11)

how to fix it?