Thanks for the updated version of the Wordpress plugin. I was able to use manual setup to successfully register the OpenID client. However, when I start the authentication flow, it halts on the following error (I've sent more complete logs and additional info via e-mail to Jajati Badu...)
ERROR [org.xdi.oxd.server.service.UmaTokenService] Token is blank in response, site: Rp{oxdId='a4fb1ff1-d692-440d-8128-c7bbf12e66e6', opHost='https://oidc.surfconext.nl', opDiscoveryPath='null', idToken='null', accessToken='null', authorizationRedirectUri='https://surf.leerpodium.nl/login/index.php?option=oxdOpenId', postLogoutRedirectUri='https://surf.leerpodium.nl/login/index.php?option=allLogout', applicationType='web', redirectUris=[https://surf.leerpodium.nl/login/index.php?option=oxdOpenId], claimsRedirectUri=[], responseTypes=[code], clientId='XXXXXXXXXX', clientSecret='XXXXXXXXXX', clientRegistrationAccessToken='null', clientRegistrationClientUri='null', clientIdIssuedAt=null, clientSecretExpiresAt=null, clientName='null', sectorIdentifierUri='null', clientJwksUri='', setupOxdId='null', setupClientId='null', scope=[openid, address, email, profile, phone], uiLocales=[en], claimsLocales=[en], acrValues=[], grantType=[authorization_code, client_credentials], contacts=[], userId='null', userSecret='null', pat='null', patExpiresIn=0, patCreatedAt=null, patRefreshToken='null', umaProtectedResources=[], rpt='null', rptTokenType='null', rptPct='null', rptExpiresAt=null, rptCreatedAt=null, rptUpgraded=null, oxdRpProgrammingLanguage=null}
ERROR [org.xdi.oxd.server.Processor] Failed to obtain PAT.
java.lang.RuntimeException: Failed to obtain PAT.
at org.xdi.oxd.server.service.UmaTokenService.obtainTokenWithClientCredentials(UmaTokenService.java:209)
at org.xdi.oxd.server.service.UmaTokenService.obtainToken(UmaTokenService.java:168)
at org.xdi.oxd.server.service.UmaTokenService.obtainPat(UmaTokenService.java:150)
at org.xdi.oxd.server.service.UmaTokenService.getPat(UmaTokenService.java:145)
at org.xdi.oxd.server.service.ValidationService.introspect(ValidationService.java:136)
at org.xdi.oxd.server.service.ValidationService.validate(ValidationService.java:108)
at org.xdi.oxd.server.service.ValidationService.validate(ValidationService.java:51)
at org.xdi.oxd.server.Processor.process(Processor.java:74)
at org.xdi.oxd.server.Processor.process(Processor.java:51)
at org.xdi.oxd.server.SocketProcessor.run(SocketProcessor.java:55)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
2018-02-18 15:51:37,815 TRACE [org.xdi.oxd.server.Processor] Send back response: {"status":"error","data":{"error":"internal_error","details":null,"error_description":"Unknown internal server error occurs."}}