This is not an error with the installation mainly, but the connection to the license server. The License Server can't be connected to. You should have someone internally that set up the license server and so best talk to them about connections.
A client installed License Server is not that common AFAIK and so you may not get that much info here, and definitely not with that little info. I'm assuming that you are in IT if you are dealing with this, if not, consider engaging IT.
Test the status of the license server (
C:\Program Files\Alteryx\LicenseServer\server>flexnetls.bat -status
) and that it is working with a designer. If that's working, but the Server is still not, then check ports etc and that the Server can reach the license server. This looks like a connection issue is the license server tests as fine.
