Okay, so I copy and pasted the relevant code into a new app. Here is a link to clone it:
https://anvil.works/ide#clone:Q2GWXJDRVGWVGHC6=CRYZQQDMXRBK3JSK6E5726DU
As you can see in the MarkingModule function auto_mark_self I’m getting the lat and lon from the function auto_location in the same module, which generates the HTTPError0. If you instead use the server call version (commented out initially) you can see what I want to happen and it “works” but obviously pulls the server IP address.
Thanks for all the help, I’m still new to this