During my attempt to manually configure the router via WinBox, following the configuration commands, I have stumbled upon a potential cause for the error I am receiving.
Source:
https://wiki.mikrotik.com/wiki/Manual:Master-port
"...but prior to RouterOS v6.41 port switching had to be done using a property called master-port."
"To solve these issues, the master-port property had to be REPLACED with a more robust and convenient concept - a bridge."
The page also mentions a script that will automatically convert old configurations to newer ones. If anyone could help me locate the auto-converter or show me how to reformat the old config, I would be eternally greatful!
~~~ OLD SCRIPT ~~~
/interface ethernet
set [ find default-name=ether2 ] name=ether2-master
set [ find default-name=ether3 ] master-port=ether2-master
set [ find default-name=ether4 ] master-port=ether2-master
set [ find default-name=ether5 ] master-port=ether2-master
set [ find default-name=ether6 ] name=ether6-master
set [ find default-name=ether7 ] master-port=ether6-master
set [ find default-name=ether8 ] master-port=ether6-master
set [ find default-name=ether9 ] master-port=ether6-master
set [ find default-name=ether10 ] master-port=ether6-master