Subdomain - Invalid request IP

1. My Caddy version (caddy -version): Caddy v1.0.4

2. How I run Caddy:

a. System environment: FreeNas Jail - FreeBSD Version 11.2-RELEASE-p6

b. Command: service caddy start

d. My complete Caddyfile:

foo.site { 
	root /usr/local/www/foo.site
	tls {
		dns namecheap
	}
}
    
http://plex.foo.site { 
	proxy / 192.168.1.102:32400 { 
		transparent
	}
	tls {
		dns namecheap
	}
}

http://nextcloud.foo.site { 
	proxy / 192.168.1.103 { 
		transparent
	}
	tls {
		dns namecheap
	}
}

http://shinobi.foo.site { 
	proxy / 192.168.1.104:8080 { 
		transparent 
		websocket
	}
	tls {
		dns namecheap
	}	
}

3. The problem I’m having:

I am successfully hosting Caddy inside a FreeNas jail. I’m able to run a locally served file system website at the address “foo.site”. Caddy is able to successfully register an SSL certificate for this site. I also reverse proxy to three other sites, which are subdomains of “foo.site”. However, when attempting to remove “http://” from the Caddy file to initiate the SSL certificate registration and creation process, I receive an error in caddy.log file:

4. Error messages and/or full log output:

2020/01/08 07:36:27 [INFO] [shinobi.foo.site] acme: Obtaining bundled SAN certificate
2020/01/08 07:36:27 [INFO] [shinobi.foo.site] AuthURL: https://acme-v02.api.letsencrypt.org/acme/authz-v3/2176895688
2020/01/08 07:36:27 [INFO] [shinobi.foo.site] acme: Could not find solver for: tls-alpn-01
2020/01/08 07:36:27 [INFO] [shinobi.foo.site] acme: Could not find solver for: http-01
2020/01/08 07:36:27 [INFO] [shinobi.foo.site] acme: use dns-01 solver
2020/01/08 07:36:27 [INFO] [shinobi.foo.site] acme: Preparing to solve DNS-01
2020/01/08 07:36:27 [INFO] [shinobi.foo.site] acme: Cleaning DNS-01 challenge
2020/01/08 07:36:28 [WARN] [shinobi.foo.site] acme: error cleaning up: namecheap: Invalid request IP: 70.110.180.2 [1011150] 
2020/01/08 07:36:28 [INFO] Deactivating auth: https://acme-v02.api.letsencrypt.org/acme/authz-v3/2176895688
2020/01/08 07:36:28 [ERROR][shinobi.foo.site] failed to obtain certificate: acme: Error -> One or more domains had a problem:
[shinobi.foo.site] [shinobi.foo.site] acme: error presenting token: namecheap: Invalid request IP: 70.110.180.2 [1011150] (attempt 3/3; challenge=dns-01)
2020/01/08 07:36:29 failed to obtain certificate: acme: Error -> One or more domains had a problem:
[shinobi.foo.site] [shinobi.foo.site] acme: error presenting token: namecheap: Invalid request IP: 70.110.180.2 [1011150]

5. What I already tried:

Since the root domain for the locally hosted site is working properly, I know that both Caddy and the included NameCheap plugin are working correctly.

I believe my local network’s DNS server is providing the correct DNS record to Caddy:

nslookup shinobi.foo.site
Server:  DD-WRT
Address:  192.168.1.1

 Name:    shinobi.foo.site
 Address:  70.110.180.2

In addition, I believe my NameCheap “Advanced DNS” configuration has been set up properly. I have no problems accessing any of the sites when outside of my local network:

Type		Host		Value			TTL

A Record	@			70.110.180.2	Automatic

A Record	nextcloud	70.110.180.2	Automatic

A Record	plex		70.110.180.2	Automatic

A Record	shinobi		70.110.180.2	Automatic

Ideally, I’d prefer it if I could configure Caddy to register a Wild Card Certificate for foo.site, and then have that used to secure all of the *.foo.site subdomains… but I have no idea if this is possible.

Any guidance or assistance anyone can provide will be greatly appreciated. Thanks very much!