This tip speaks to the ssl protocol error you’re getting, Community Tip - Fixing ERR SSL PROTOCOL ERROR. I’d try quick fix idea 5. Can you disable TLS 1.3 on the edge certificate tab of the SSL/TLS app on the Cloudflare dashboard?
Edit - Now we’re making progress. I see 1.3 is disabled and the protocol error is addressed, but you have mixed content with a script. Normally, we’d use Automatic HTTPS Rewrites to address mixed content issues, but that switch won’t affect scripts. Lots of details on how to address on this site and in this #CommunityTip, Community Tip - Fixing mixed content errors and this #Tutorials, Mixed Content.
