Ultimately, the problem could have been resolved from the screenshots!
The solution is not something that I saw in the documentation, but it probably squirrelled away in there somewhere...
I configured my logical port for management and for service. It seems that the ftp will only work when the logical port is configured only for service.
This is annoying for me, as I wanted to be able to manage the system and access the data on it through one port, but will now need to consider another approach. But I can at least now use ftps.