Thank you for helping me locate the source of the error！！Indeed, it was due to a conflict between Cloudflare’s cache settings and the cache settings of my server management panel, 1Panel. After I turned off the cache switch in the 1Panel server management panel, my website returned to normal. I had installed the Linux server management panel 1Panel and configured a reverse proxy for my website within it, also enabling the website’s cache switch, which led to a series of errors. Now that I have turned off the switch, everything is back to normal. I am extremely grateful for your patience! Without your help, I really wouldn’t have known where to start in diagnosing and resolving this issue!!! The Discourse community is truly one of the friendliest communities out there!! I believe that with the support of enthusiasts like you, it will become the most popular forum framework in the world! 