Getting Error 505 - Anyone Know How to Fix This HTTP Version Not Supported Issue? or Error 505 - HTTP

UPDATE: Yo, thanks for all the tips! Tried the HTTP/2 flag in Chrome and it *kinda* worked—site loaded but super slow.

Weirdly, my phone on 5G worked fine. Maybe my ISP’s being weird? Gonna try a VPN later.

Appreciate the help, y’all! If anyone’s got more ideas, hmu.