not working

[Sinitra]

Hello,
i like your code. i need little help. i will try run pritunl-http-api, but i get this json everysingle time.

{
"data": "",
"entryType": "Pritunl OpenVPN Operation",
"error": "pritunl init client operation error: Post /auth/session: unsupported protocol scheme """,
"statusCode": 1
}

i will try diff url combination

first try,
url = "${PRITUNL_COMMON_URL||https://vpn.example.net}"
another,
url = "${PRITUNL_COMMON_URL||http://vpn.example.net}"
another,
url = "${PRITUNL_COMMON_URL||http://PUB.LIC.IP.XX}"
another,
url = "${PRITUNL_COMMON_URL||https://PUB.LIC.IP.XX}"

Could you please check?

go version go1.16.5 linux/amd64
centos 7