New user: wESP32 Failed To Prepare Configuration

I’m very new with ESP32 projects. At one point last year, I had an ESP32 setup to do some motion tracking with a LD1125H board, but I never really understood what I was doing besides following existing guides.

Now I have a wESP32, so I stared up the ESPHome Add-on, found an example config file and am trying to install it. I select Install > Plug into this computer > Select the CP2102N device, and connect. I then get an error that says “Failed to Prepare Configuration.” When I click See what went wrong, I just get a blank screen.

If I select Install > Manual Download, I again get a blank screen and no .bin files attempts to download.

If I go to https://web.esphome.io/, I can connect and Prepare for first use just fine, but the ESPHome Addon seems to be giving me the trouble. Am I missing something really basic?

EDIT: Figured out step 1 that I was doing wrong. I access my HA through an nginx proxy. I reverted to just using the ip of the host on my network and now I’m at least getting a .bin file.