I’ve seen this exact issue recently, and your screenshot matches it perfectly. The empty Identity Provider dropdown with the “Error trying to load connection provider parameters” message is usually not a configuration issue.
Since it’s happening across multiple tenants and environments, it’s very likely a platform or policy-related issue. In many cases, the maker portal is unable to load OAuth provider metadata due to things like tenant restrictions or backend service issues.
What worked for me was:
Use the Swagger editor and define OAuth 2.0 manually instead of relying on the dropdown
Retry later or in a different browser session, as the issue can be intermittent
Example (simplified):
"securityDefinitions": {
"oauth2_auth": {
"type": "oauth2",
"flow": "accessCode",
"authorizationUrl": "https://login.microsoftonline.com/{tenant-id}/oauth2/authorize",
"tokenUrl": "https://login.microsoftonline.com/{tenant-id}/oauth2/token",
"scopes": {
"api.read": "Read access"
}
}
}
If you want to confirm the root cause, open Dev Tools (F12), go to Network, and check for a failed request when opening the Security tab. That usually points to what’s being blocked.
If it keeps happening, raising a support ticket might be necessary.
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