On Tuesday, March 17, 2020 at 1:13:32 PM UTC-4, G Hammer wrote:
>
> The issue is resolved by the following:
>
> I installed 
> libfreetype6-dev
> libjpeg-dev
> python-cjson
>
> I uninstalled the skin, made certain the directories were gone, rebooted 
> and installed the skin again.
>
> After configuring, I get full functionality..
>
> The last item is to resolve why my local mosquitto server is not accepting 
> IPv6 websockets.
>
> sudo netstat -tulpn | grep -E '8883|9001'
> tcp        0      0 0.0.0.0:8883            0.0.0.0:*              
>  LISTEN      968/mosquitto       
> tcp        0      0 0.0.0.0:9001            0.0.0.0:*              
>  LISTEN      968/mosquitto       
> tcp6       0      0 :::8883                 :::*                    
> LISTEN      968/mosquitto
>
> Not a firewall or iptables issue:
> root@srvr:~# ufw status
> Status: inactive
> root@srvr:~# systemctl status iptables-persistent
> Unit iptables-persistent.service could not be found.
> root@srvr:~# systemctl status iptables
> Unit iptables.service could not be found.
>
> I'll note that websockets IPv6 is not shown in the mosquitto startup logs. 
> But I'm not certain websockets would show each type as the other sockets do:
> 1584380087: mosquitto version 1.4.15 (build date Tue, 18 Jun 2019 11:42:22 
> -0300) starting
> 1584380087: Config loaded from /etc/mosquitto/mosquitto.conf.
> 1584380087: Opening ipv4 listen socket on port 1883.
> 1584380087: Opening ipv6 listen socket on port 1883.
> 1584380087: Opening ipv4 listen socket on port 8883.
> 1584380087: Opening ipv6 listen socket on port 8883.
> 1584380087: Opening websockets listen socket on port 9001.
>
> Any mosquitto assist would be helpful.
>

It seems that the websockets included with Linux Mint 19.3 does not have 
IPv6 support compiled into it.
Lousy choice on the part of Linux Mint. 

I hope this might save someone else from the same.

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