Two issues.
Hitch. I put a straight pull-behind hitch on my cargo bike, but still not using an automobile hitch. Most bike trailers attach near the axle which is a good place, but if hooking on one side, needs a bent tongue to allow turning of the rear wheel.
Weight. The Harbor Freight trailer is pretty light. I'm not seeing it on the website anymore, and saw an issue with a DOT review on HF tires a while ago.. perhaps related. I have an older "Haulin" brand 4x8 trailer. Much more substantial than the Harbor Freight trailers, but still light by car standards. Maybe a couple of hundred pounds... that will be a substantial amount of your bike cargo capacity.