When you go to challenge file at http://www.beok.world/.well-known/acme-challenge/gcLVYnJMVjG9LEI9IvQFcxhWEL5eVri46TnTE7NG1GE the response returned is gcLVYnJMVjG9LEI9IvQFcxhWEL5eVri46TnTE7NG1GE.99Car8XBoAssNNq10FIj1HecN532gCsVA3hxrbUd6Jw
How come Let's Encrypt seeing different response here?. Doesn't it make simple GET request to challenge file url at http://www.beok.world/.well-known/acme-challenge/gcLVYnJMVjG9LEI9IvQFcxhWEL5eVri46TnTE7NG1GE ?
maybe ohv hijacks by user agent for their cert? you may want to talk with OHV
Would it be possible to mimic the user agent in PostMan and see if OVH really hijacks the response?. What User Agent does Let's Encrypt send in requests?.
Mozilla/5.0 (compatible; Let's Encrypt validation server; +https://www.letsencrypt.org)
not sure it's right
I use curl with:
-A "Mozilla/5.0 (compatible; Let's Encrypt validation server; +https://www.letsencrypt.org)"
Thank you so much for all your help! 
Now I see that OVH intentionally overrides the response when Let's Encrypt user agent is used!!. We will contact OVH for further resolution. Please close this ticket.
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