You may get errors with the following codes while running the authentication server.

ErrorMeaning
temporarily_unavailableAn unexpected system error. Check the Authentication Server logs.
invalid_request The Authentication Server client sent an incomplete request. Check the Authentication Server logs.
unsupported_response_typeThe Authentication Server client sent an invalid response type in the request. Check the Authentication Server logs.
unauthorized_clientThe Authentication Server client is not included in the list of authorized clients. Check the server configuration file <Teamwork Cloud dir>WebAppPlatform/shared/conf/authserver.properties (parameter authentication.client.ids).
404Teamwork Cloud REST endpoint for user credentials checking is not found. Check the server configuration file <Teamwork Cloud dir>/WebAppPlatform/shared/conf/authserver.properties (parameter twc.server.identity.check.api).
system_errorUnexpected system error or problems with the keystore management. For the keystore check if the valid keystore.p12 file exists in the <Teamwork Cloud dir>/configuration directory.