Single post using server-based url (not domain-based)

Hello,

Some friends and I invested in a private server. I have moved my blog over there.

Over all it works great exdept that when clicking on a permalink, instead of having something like:

https://guillaumeb.com/2007/02/07/holidays-soon/
(which actually works)
it automatically generates a url based on the server:
https://sd-6536.dedibox.fr/~guillaumeb/2007/02/07/holidays-soon/

Of course I’ve checked my theme but all my links are using the domain and not the server.

Anyone knows where I should be looking to solve this problem?

Thanks