Remote access stopped working

Just a day or so ago the remote access to my server stopped working. The log repeats this error

[2019-11-06 19:29:42.739 -08:00] [ERR] Error creating http port map
MediaBrowser.Model.Net.HttpException: Internal Server Error
   at Emby.Server.Implementations.HttpClientManager.HttpClientManager.EnsureSuccessStatusCode(HttpResponseMessage response, HttpRequestOptions options)
   at Emby.Server.Implementations.HttpClientManager.HttpClientManager.SendAsyncInternal(HttpRequestOptions options, HttpMethod httpMethod)
   at Emby.Server.Implementations.HttpClientManager.HttpClientManager.SendAsync(HttpRequestOptions options, HttpMethod httpMethod)
   at Mono.Nat.Upnp.UpnpNatDevice.CreatePortMap(Mapping mapping)
   at Emby.Server.Implementations.EntryPoints.ExternalPortForwarding.CreateRules(INatDevice device)

I have stripped out all my network settings and redone them. I have redone all port forwarding and ddns settings. Nothing seems to fix my problem.

The latest log also contains the following. Address have been changed of course.

[2019-11-06 19:48:41.912 -08:00] [ERR] Could not find handler for "/"
[2019-11-06 19:48:41.919 -08:00] [ERR] Error processing request: "Unable to find the specified file."
[2019-11-06 19:48:42.579 -08:00] [ERR] Could not find handler for "/"
[2019-11-06 19:48:42.579 -08:00] [ERR] Error processing request: "Unable to find the specified file."
[2019-11-06 19:56:32.753 -08:00] [WRN] HTTP Response 200 to "MY-LOCAL-IP". Time (slow): 0:00:00.9100656.

Any suggestions? Server is running on Ubuntu LTS with static ip. DDNS address is being updated by router and windows app on other pc.

If you’re doing the port mappings manual do you have the “Enable automatic port mapping” option disabled in the networking section of the server dashboard?

Is this problem across all devices externally? What version of the server are you runing?