Geo Admin Area returns 404 error for a secondary node

I’ve created two geo nodes, a primary and a secondary. I configured the nodes per the docs. I set up SSL, and then attempted to add the secondary node to the primary in the admin area. A 404 error for the secondary node is returned in the Geo Admin Area on the primary node, specifically “Request failed with status code 404”. Running the command sudo gitlab-rake gitlab:geo:check indicates that the secondary node is healthy. I’m aware of this section of the docs, but adding an entry to the host file produces no change, nor does restarting the application or running reconfigure.