Dear Anton,
Thank you very much for reporting the issue and I am very sorry about the issue!
First, I would like to make sure that all of the addresses below are uninterrupted and allowed by any firewall/VPN/antivirus rules:
http://activity-api.graphisoft.com
graphisoftid.graphisoft.com
graphisoftid-api.graphisoft.com
licensemanager.graphisoft.com
ruleservice-api.graphisoft.com
bimx-service.graphisoft.com
https://bimx-api.graphisoft.com
https://bimx.graphisoft.com
If that doesn't help, I'm wondering if it is possible to open the License Manager Tool and login from there?
Also, I saw that you are still using Internet Explorer (the old one). Could you give a try with another, most up to date browser, as IE is very old by today standard.
Looking forward to hearing from you!
Best regards,
Minh
Minh Nguyen
Technical Support Engineer
GRAPHISOFT