Problem with desktop client-->it cant find my server

Your IP is 91.185.202.226 but it doesnt work too. One of my user had the same problem and I solve the problem like that but it doesnt work for you.
I dont understand the problem because it works on Linux. This can only be a problem of security (Mac) but client NextCloud says that it is a DNS issue. So… IDK.

Others users encounter similar issue :