400 Bad Request cloudflare

Hi, some people that enters my page receive a message that says 400 Bad Request cloudflare.
How can I solve this? Please, it’s urgent.
Thanks.

My page is: subgrupo2.ga

Hello,

A 400 always comes from your server.
There is a problem with the server
Sometimes, due to problems in the server of the site in question, the requests sent to the server may not be answered correctly.

For this case, try to contact the support of the server and the site you want to access to investigate the problem.

https://community.cloudflare.com/search?q=400%20Bad%20Request%20

Some applications or host providers might find it handy to know about Cloudflare’s IPs. This page is intended to be the definitive source of Cloudflare’s current IP ranges.

You also have a 404 problem

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