Caddy server with OMBI

I have a instance of OMBI installed on my Amazon aws server,this all works fine. I’m trying to get a reserve proxy to work with ombi using caddy server but im facing some issue getting this to work correctly.

So i have a domain and i have created an A record in the DNS record of this domain to put to my external IP of the AWS server. Next i have downloaded Caddy Server and created a caddyfile and i have the following config inside this file. {
proxy / internal ip :5000 {

i then go to a cmd go to the directory and type caddy.exe and all i get is the following errors

Activating privacy features… 2019/01/19 00:50:58 [INFO] [] acme: Obtaining bundled SAN certificate
2019/01/19 00:50:59 [INFO] [] AuthURL:
2019/01/19 00:50:59 [INFO] [] acme: use tls-alpn-01 solver
2019/01/19 00:50:59 [INFO] [] acme: Trying to solve TLS-ALPN-01
2019/01/19 00:51:05 [] failed to obtain certificate: acme: Error → One or more domains had a problem:
[] acme: error: 403 :: urn:ietf:params:acme:error:unauthorized :: Cannot negotiate ALPN protocol “acme-tls/1” for tls-alpn-01 challenge, url:

I have researched this error for a good few hours now and im not getting anyway. Any help would be appreciated

Can you provide your actual caddyfile, all of it.

You can leave the domain names or if you must obscure them, replace the main domain name with example so becomes and becomes

On the face of it it ooks like you are not allowed to create a https cert for your domain name.

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