Remember: It is always better to first update the license server and then only then update Solidworks. It avoids being stuck like me with a version of solidworks more recent than the license server.
The response of the Axemble hotline:
As indicated by phone, on the server workstation, you must run the setup so that it offers by default to update the license server. Once downloaded and updated, the manager must be run on the server so that it offers to activate the licenses in the latest version of SolidWorks.