Thank you for your post.
I've seen this occur when the configured LDAP server is unreachable. That is, once Launch Center is displayed, click the Hosts tab, and then click the gear icon at the bottom of the Hosts pane and select "Configure LDAP". If everything is filled out correctly, make sure the LDAP server is running. Otherwise, the next time you quit and relaunch, it will take more than a minute to display since the LDAP server is unreachable.
Keep me updated with any progress.
this was the solution.
There was an old LDAP Server from an old Project configured.