Can't login with Discord

[quickflick346]

Trying to sign in with Discord takes me to https://gex.honu.pw/auth/callback?code=IFp22BgH...... with the following error:

{
"type": "/auth/callback",
"title": "internal server error: An error was encountered while handling the remote login.",
"status": 500,
"detail": "Microsoft.AspNetCore.Authentication.AuthenticationFailureException: An error was encountered while handling the remote login.\n ---\u003E Microsoft.AspNetCore.Authentication.AuthenticationFailureException: Correlation failed.\n --- End of inner exception stack trace ---\n at Microsoft.AspNetCore.Authentication.RemoteAuthenticationHandler1.HandleRequestAsync()\n at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)\n at Microsoft.AspNetCore.ResponseCaching.ResponseCachingMiddleware.Invoke(HttpContext httpContext)\n at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)\n at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)\n at Microsoft.AspNetCore.RateLimiting.RateLimitingMiddleware.InvokeInternal(HttpContext context, EnableRateLimitingAttribute enableRateLimitingAttribute)\n at gex.Code.ExceptionHandlerMiddleware.Invoke(HttpContext context, ILogger1 logger) in /home/gex/gex/gex/Code/ExceptionHandlerMiddleware.cs:line 32",
"instance": "error:dc4152eb-cdcf-40b8-9539-9bf73c448769",
"extensions": {

}
}

[Varunda]

additional warning before the error:

WARN [AspNet.Security.OAuth.Discord.DiscordAuthenticationHandler] [CorrelationCookieNotFound] '.AspNetCore.Correlation.5UOMY7CEJtfm8pa<snip>' cookie not found.

i'm able to login successfully. is there anything in the browser console that might indicate the error? does this consistently happen always? or did it start recently?

[fcaps]

got a related issue, but i may have a hint, the callback_url is http and redirected to https.
Did somebody lately sign in for the first time?
here is mine:

  "type": "/auth/callback",
  "title": "internal server error: An error was encountered while handling the remote login.",
  "status": 500,
  "detail": "Microsoft.AspNetCore.Authentication.AuthenticationFailureException: An error was encountered while handling the remote login.\n ---> System.NullReferenceException: Object reference not set to an instance of an object.\n   at gex.Startup.<>c.<ConfigureServices>b__4_19(JsonElement user) in /home/gex/gex/gex/Startup.cs:line 195\n   at Microsoft.AspNetCore.Authentication.OAuth.Claims.CustomJsonClaimAction.Run(JsonElement userData, ClaimsIdentity identity, String issuer)\n   at Microsoft.AspNetCore.Authentication.OAuth.OAuthCreatingTicketContext.RunClaimActions(JsonElement userData)\n   at AspNet.Security.OAuth.Discord.DiscordAuthenticationHandler.CreateTicketAsync(ClaimsIdentity identity, AuthenticationProperties properties, OAuthTokenResponse tokens)\n   at Microsoft.AspNetCore.Authentication.OAuth.OAuthHandler`1.HandleRemoteAuthenticateAsync()\n   at Microsoft.AspNetCore.Authentication.RemoteAuthenticationHandler`1.HandleRequestAsync()\n   --- End of inner exception stack trace ---\n   at Microsoft.AspNetCore.Authentication.RemoteAuthenticationHandler`1.HandleRequestAsync()\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)\n   at Microsoft.AspNetCore.ResponseCaching.ResponseCachingMiddleware.Invoke(HttpContext httpContext)\n   at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)\n   at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)\n   at Microsoft.AspNetCore.RateLimiting.RateLimitingMiddleware.InvokeInternal(HttpContext context, EnableRateLimitingAttribute enableRateLimitingAttribute)\n   at gex.Code.ExceptionHandlerMiddleware.Invoke(HttpContext context, ILogger`1 logger) in /home/gex/gex/gex/Code/ExceptionHandlerMiddleware.cs:line 32",
  "instance": "error:0c1930bd-ad13-4feb-ad6d-7b1fc959fcde",
  "extensions": {}
}

Related: 

{
  "type": "/auth/callback",
  "title": "internal server error: An error was encountered while handling the remote login.",
  "status": 500,
  "detail": "Microsoft.AspNetCore.Authentication.AuthenticationFailureException: An error was encountered while handling the remote login.\n ---> Microsoft.AspNetCore.Authentication.AuthenticationFailureException: Correlation failed.\n   --- End of inner exception stack trace ---\n   at Microsoft.AspNetCore.Authentication.RemoteAuthenticationHandler`1.HandleRequestAsync()\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)\n   at Microsoft.AspNetCore.ResponseCaching.ResponseCachingMiddleware.Invoke(HttpContext httpContext)\n   at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)\n   at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)\n   at Microsoft.AspNetCore.RateLimiting.RateLimitingMiddleware.InvokeInternal(HttpContext context, EnableRateLimitingAttribute enableRateLimitingAttribute)\n   at gex.Code.ExceptionHandlerMiddleware.Invoke(HttpContext context, ILogger`1 logger) in /home/gex/gex/gex/Code/ExceptionHandlerMiddleware.cs:line 32",
  "instance": "error:6bb2255b-ebc3-4019-858a-ed6a60457342",
  "extensions": {}
}

[Varunda]

yeah, this keeps popping up every once in a while and it seems like just trying again works? super inconsistent. would need to know browser and OS to see if there's a pattern