So I died to a Scav and got the following popup.
After playing around with some of the JSON files I found the below fixed the problem.
I searched for the id, provided in the error code (and in the error log), in the /user/profiles/ JSON and found 2 lines.
The second line used the term "location" with a 1, based on the error saying it was expected at 0, I changed it, saved and re-ran the game.
Problem solved!
Hopefully this will assist anyone else with a similar issue!