Cisco ValetPlus (M20) Not Receiving IP From Cisco 1841

Our Cisco 1841 router is set to assign IP addresses on the network, however our wifi access point (M20) will not resolve an IP address from the router for some reason. Using the exact same physical port, I plugged in my laptop and it assigned an IP address to it right away, without any issues.

I logged into the router via HTTP and released/renewed the IP address. By default, the M20 resolves a loopback address, and the moment I release/renew, it resolves nothing. Yet once again, the second I plug in my laptop, all is well connectivity-wise.

The odd thing is that the M20's link lights suggest the router is receiving internet connectivity just fine, however no device connected to it either via wifi or directly via ethernet port can receive any network connectivity whatsoever.

I'm not keen on SSH routers, particularly the configuration of the 1841. Anything with syntax is super-intimidating and wildly confusing, so naturally, I figure the issue is with my zero understanding of SSH or its syntax on the 1841.