CORS issue attempting to connect with SubFire client

[acroyear]

I'm the maintainer of the SubFire suite of apps for subsonic (and currently the only Subsonic client for Amazon FireTV's platform). I like to verify that my libraries support Subsonic-compatible products, and I hit an issue trying to connect to roadie dot rocks.

https://subfiresuite.com/base/#/

in Login, set

• current selection: "New Server"
• name roadie-test
• Server https://roadie.rocks:8080/subsonic

username and password

What I'm hitting is "CORS Error" on ping.view . Unlike jamsstash, my headers include Sec-Fetch-Mode: cors , and I use token+seed authentication, not enc:, if those make a difference.

CORS Error implies that I didn't get back the expected header "Access-Control-Allow-Origin: *"