3740756 - Error "A server error has occurred!" while accessing Settings page - Tricentis

• This article will provide you with a possible solution for a "A server error has occurred!" error while attempting your Tosca Servers Settings page.

• Your company utilizes a Load balancer / Reverse Proxy / Web Application Firewall to access your Tosca Server.
  

  You reconfigured your Tosca Server GatewaySettings to match your Load Balancer’s hostname
  

  After restarting your Tricentis services you are experiencing the error "A server error has occurred!" while accessing the Settings page via https://a123.host /#/configuration/gatewayservice 
  

  Looking into the Tricentis Authentication Service Logs we can see the error "Invalid redirect_uri " being logged:

  {"Timestamp":"2023-12-19T11:06:39.5469085+01:00","Level":"Error","MessageTemplate":"Invalid redirect_uri: {detail}\n{@requestDetails}","Properties":{"detail":"https://a123.host/gateway-signin","requestDetails":{"_typeTag":"AuthorizeRequestValidationLog","ClientId":"GatewayFrontend","ClientName":null,"RedirectUri":null,"AllowedRedirectUris":["https://server.host/gateway-signin"],"SubjectId":"4a5fc091-f512-4f9d-a5e3-d2368c9ba97a","ResponseType":null,"ResponseMode":null,"GrantType":null,"RequestedScopes":"","State":null,"UiLocales":null,"Nonce":null,"AuthenticationContextReferenceClasses":null,"DisplayMode":null,"PromptMode":"","MaxAge":null,"LoginHint":null,"SessionId":null,"Raw":{"client_id":"GatewayFrontend","redirect_uri":"https://a123.host/gateway-signin","response_type":"id_token token","scope":"openid profile role NotificationServiceApi","state":"b0051a8e3b9747a397a843e18e63e4cf","nonc

SAP Enterprise Continuous Testing by Tricentis

services.msc, TOSCA, Tricentis.AuthenticationService  , KBA , XX-PART-TRI-ECT , SAP Enterprise Continuous Testing by Tricentis , Problem