System.InvalidOperationException: Sequence contains more than one matching element
   at System.Linq.ThrowHelper.ThrowMoreThanOneMatchException()
   at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at IdentityServer4.EntityFramework.Stores.ClientStore.FindClientByIdAsync(String clientId)
   at IdentityServer4.Stores.ValidatingClientStore`1.FindClientByIdAsync(String clientId)
   at IdentityServer4.Stores.IClientStoreExtensions.FindEnabledClientByIdAsync(IClientStore store, String clientId)
   at IdentityServer4.Validation.AuthorizeRequestValidator.LoadClientAsync(ValidatedAuthorizeRequest request)
   at IdentityServer4.Validation.AuthorizeRequestValidator.ValidateAsync(NameValueCollection parameters, ClaimsPrincipal subject)
   at IdentityServer4.Endpoints.AuthorizeEndpointBase.ProcessAuthorizeRequestAsync(NameValueCollection parameters, ClaimsPrincipal user, ConsentResponse consent)
   at IdentityServer4.Endpoints.AuthorizeEndpoint.ProcessAsync(HttpContext context)
   at IdentityServer4.Hosting.IdentityServerMiddleware.Invoke(HttpContext context, IEndpointRouter router, IUserSession session, IEventService events, IBackChannelLogoutService backChannelLogoutService)
   at IdentityServer4.Hosting.IdentityServerMiddleware.Invoke(HttpContext context, IEndpointRouter router, IUserSession session, IEventService events, IBackChannelLogoutService backChannelLogoutService)
   at IdentityServer4.Hosting.MutualTlsEndpointMiddleware.Invoke(HttpContext context, IAuthenticationSchemeProvider schemes)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at IdentityServer4.Hosting.BaseUrlMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

HEADERS
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