From an API call like this following the API documentation:
curl --location 'https:///api/map/sync?syncAll=false&forceTiled=true'
--header 'Content-Type: application/json'
--header 'X-API-Key: '
--data '["packed.yml"]'
I get the following error: https://pastebin.com/KS8KkxW9
Manually going on the server and running
bin/Content.MapRenderer/Content.MapRenderer --format webp --viewer Elkridge
from the build directory successfully renders the map.
It appears that the -f flag does not work as expected.