Hi,
I continued my project this morning and corona says to me that license server can’t be reached or I am not logged in.
If I click open the license server, firefox says that it can’t establish connection.
How can I get my license working again?
Old fashioned reboot did the trick 
Now it’s working.
I’m glad that you have managed to get your issue solved!
Next time when some licensing issues appears, please consider the following:
- Check out our basic troubleshooting guides - https://support.chaos.com/hc/en-us/articles/5147044693393-Corona-8-Chaos-License-Server-Basic-Troubleshooting-Steps
- Submit a support ticket - https://support.chaos.com/hc/en-us/requests/new