Using public FHIR server LOINC e SNOMED-CT

[APicchio]

I’m trying to use public FHIR servers: LOINC FHIR server and SNOMED-CT FHIR server but I have an error when I use LOINC FHIR server.

I configurated these servers in the file "fhir-server-config.json" in the following way:

"term": {
"remoteTermServiceProviders": [
{
"__comment": "Configuration for public LOINC endpoint",
"enabled": true,
"base": "https://fhir.loinc.org",
"basicAuth": {
"username": "XXXX",
"password": "XXX"
},
"supports": [{
"system": "http://loinc.org"
}]
},
{
"__comment": "Configuration for public SNOMED-CT endpoint",
"enabled": true,
"base": "https://snowstorm-fhir.snomedtools.org/fhir",
"supports": [{
"system": "http://snomed.info/sct"
}]
}]
},

The request is:
https://192.168.99.99:9443/fhir-server/api/v4/CodeSystem/$lookup?code=718-7&system=http://loinc.org

The response is:
"severity": "fatal",
"code": "not-supported",
"details": {
"text": "CodeSystem with url 'http://loinc.org' is not available"
}

I tried to call directly the public FHIR server using the same parameters and it’s work.
https://fhir.loinc.org/CodeSystem/$lookup?code=718-7&system=http://loinc.org

Maybe I miss some steps or configurations?
Thanks in advance,
Alex