Traffic shaping wizard creates an unloadable rule-set if using HFSC on a LAN interface that is not up when the rules are loaded.
If you choose HFSC in the wizard (multiwan/multilan) on a LAN interface that is not connected when the wizard completes or is later disconnected when the rules-set is loaded it will fail to load. The filter reload that is triggered after the wizard reports done but if you manually re-load the rules you will see the error:
$ pfctl -f /tmp/rules.debug
bandwidth for qInternet higher than interface
/tmp/rules.debug:63: errors in queue definition
Where the bad line is in the disconnected interface.
This appears to be beacause the reported bandwidth of that inbterface is 0 when down.
Setting the bandwidth of the root queue on that interface to, say, 1Gbps worksaround this.
See attached files for an example.