- Clear browser caché, sometimes, a cached version of the DNS record can cause problems. Clearing the browser cache can help ensure that the user is seeing the latest version of the record.
I forgot to mention the DNS propagation. Imagine DNS servers as a large library of internet addresses. When you make a change (like creating a CNAME), that new information needs to be updated in all the books in that library. This process can take between 24 and 48 hours, sometimes even a bit longer.
it is a pity you didn't disclose the full CNAME you have been asked to register.
Please note that your DNS zone is hosted by Wix and not OVH. You should create the CNAME there.
As soon as you have elected Wix as your zone DNS hosting, please note that dns109.ovh.net. ns109.ovh.net are defunct, and all actions taken there are useless.