king1
1
What is the name of the domain?
mundo.bienvenido.top
What is the error number?
521
What is the error message?
Web server is down
What is the issue you’re encountering
All websites which are hosting on American hosting met the 521 error
What steps have you taken to resolve the issue?
Turn off the cdn and everything work again.
What are the steps to reproduce the issue?
Turn on the cdn proxy
fritex
2
Sounds to me like an ISP issue if they’re blocking or restricting something.
Have you tried using a VPN? 
If these are your Websites, follow below article for further troubleshooting:
Otherwise, contacting Webmaster and providing them such feedback information would help them to resolve their error.
system
Closed
3
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