Can’t log in using WordPress as OpenId provider

I’ve cleaned list of trusted sites and the error changed to this:

Operation failed: The OpenID Provider issued an assertion for an Identifier whose discovery information did not match. Assertion endpoint info: ClaimedIdentifier: https://pupeno.com/ ProviderLocalIdentifier: https://pupeno.com/blog/author/pupeno/ ProviderEndpoint: https://pupeno.com/index.php/openid/server OpenID version: 2.0 Service Type URIs: (unavailable) Discovered endpoint info: [{ ClaimedIdentifier: https://pupeno.com/ ProviderLocalIdentifier: https://pupeno.com/blog/author/pupeno/ ProviderEndpoint: https://pupeno.com/openid/server OpenID version: 2.0 Service Type URIs: https://specs.openid.net/auth/2.0/signon https://openid.net/extensions/sreg/1.1 https://openid.net/sreg/1.0 }, { ClaimedIdentifier: https://pupeno.com/ ProviderLocalIdentifier: https://pupeno.com/blog/author/pupeno/ ProviderEndpoint: https://pupeno.com/openid/server OpenID version: 1.1 Service Type URIs: https://openid.net/signon/1.1 https://openid.net/extensions/sreg/1.1 https://openid.net/sreg/1.0 },]:

response:DotNetOpenAuth.OpenId.RelyingParty.FailedAuthenticationResponse

response.Exception:DotNetOpenAuth.Messaging.ProtocolException: The OpenID Provider issued an assertion for an Identifier whose discovery information did not match. Assertion endpoint info: ClaimedIdentifier: https://pupeno.com/ ProviderLocalIdentifier: https://pupeno.com/blog/author/pupeno/ ProviderEndpoint: https://pupeno.com/index.php/openid/server OpenID version: 2.0 Service Type URIs: (unavailable) Discovered endpoint info: [{ ClaimedIdentifier: https://pupeno.com/ ProviderLocalIdentifier: https://pupeno.com/blog/author/pupeno/ ProviderEndpoint: https://pupeno.com/openid/server OpenID version: 2.0 Service Type URIs: https://specs.openid.net/auth/2.0/signon https://openid.net/extensions/sreg/1.1 https://openid.net/sreg/1.0 }, { ClaimedIdentifier: https://pupeno.com/ ProviderLocalIdentifier: https://pupeno.com/blog/author/pupeno/ ProviderEndpoint: https://pupeno.com/openid/server OpenID version: 1.1 Service Type URIs: https://openid.net/signon/1.1 https://openid.net/extensions/sreg/1.1 https://openid.net/sreg/1.0 },] at DotNetOpenAuth.Messaging.ErrorUtilities.VerifyProtocol(Boolean condition, String message, Object[] args) in c:\BuildAgent\work\7ab20c0d948e028f\src\DotNetOpenAuth\Messaging\ErrorUtilities.cs:line 235
at DotNetOpenAuth.OpenId.RelyingParty.PositiveAuthenticationResponse.VerifyDiscoveryMatchesAssertion(OpenIdRelyingParty relyingParty) in c:\BuildAgent\work\7ab20c0d948e028f\src\DotNetOpenAuth\OpenId\RelyingParty\PositiveAuthenticationResponse.cs:line 157
at DotNetOpenAuth.OpenId.RelyingParty.PositiveAuthenticationResponse..ctor(PositiveAssertionResponse response, OpenIdRelyingParty relyingParty) in c:\BuildAgent\work\7ab20c0d948e028f\src\DotNetOpenAuth\OpenId\RelyingParty\PositiveAuthenticationResponse.cs:line 39
at DotNetOpenAuth.OpenId.RelyingParty.OpenIdRelyingParty.GetResponse(HttpRequestInfo httpRequestInfo) in c:\BuildAgent\work\7ab20c0d948e028f\src\DotNetOpenAuth\OpenId\RelyingParty\OpenIdRelyingParty.cs:line 508

Method: GET

which might give more clues about what’s wrong.

Not sure if relevant, but when I tried to log in on https://www.basicallymoney.com I’ve got this error:

Unable to log in with your OpenID provider:

Error parsing the HTML markup at that URL : ‘onclick’ is a duplicate attribute name. Line 204, position 1540.

Regarding your second post where you see a discovery info does not match assertion info error, the discovered info says the OP endpoint is:
https://pupeno.com/openid/server
But your WordPress provider is asserting this OP endpoint:
https://pupeno.com/index.php/openid/server

The discovered and asserted endpoints must be identical. So this is a bug either in WordPress or your configuration of it.