My Tracker's RSS Feeds have upgraded(?) to HTTPS and Tixati appears to not like the change, even removing the s from the tracker's URL simply results in the individual downloads responding with "Bad SSL Data"
The RSS Feed is openable in chrome, so a certificate failure is off the table
Thanks for any help in advance!

send those feeds to the devs with a small explanation. support@tixati.com

The site probably uses Cloudflare, if so this is a known issue.