SveaPayment app - Unable to obtain configuration from System.String

When setting up an existing dev site I got this error for the SveaPayment-app:

2022-02-17 10:32:44.1039 [App:01] [916919702a6a8343af56f989db5df72b] [ERROR] [] Microsoft.AspNetCore.Server.Kestrel - Connection id "", Request id "": An unhandled exception was thrown by the application. System.InvalidOperationException: IDX20803: Unable to obtain configuration from: 'System.String'. System.IO.IOException: IDX20807: Unable to retrieve document from: 'System.String'. HttpResponseMessage: 'System.Net.Http.HttpResponseMessage', HttpResponseMessage.Content: 'System.String'.
   at Microsoft.IdentityModel.Protocols.HttpDocumentRetriever.GetDocumentAsync(String address, CancellationToken cancel)
   at Microsoft.IdentityModel.Protocols.OpenIdConnect.OpenIdConnectConfigurationRetriever.GetAsync(String address, IDocumentRetriever retriever, CancellationToken cancel)
   at Microsoft.IdentityModel.Protocols.ConfigurationManager`1.GetConfigurationAsync(CancellationToken cancel)
   --- End of inner exception stack trace ---
   at Microsoft.IdentityModel.Protocols.ConfigurationManager`1.GetConfigurationAsync(CancellationToken cancel)
   at Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerHandler.HandleAuthenticateAsync()
   at Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerHandler.HandleAuthenticateAsync()
   at Microsoft.AspNetCore.Authentication.AuthenticationHandler`1.AuthenticateAsync()
   at Microsoft.AspNetCore.Authentication.AuthenticationService.AuthenticateAsync(HttpContext context, String scheme)
   at Microsoft.AspNetCore.Authorization.Policy.PolicyEvaluator.AuthenticateAsync(AuthorizationPolicy policy, HttpContext context)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication`1 application)

This app was installed on another machine before mine. So there is a credential missmatch in the configuration files of the app.

The solution is to uninstall the app. Then reinstall it again and add the configuration again in the Svea Payment Configuration field.

I hope you find this post valuable. If you click the ad below I get paid by someone else and can continue to publish posts for free. I would appreciate it very much.