So.... You updated the certificate and now you're locked out of the Web GUI.
Download Putty or another form of accessing the CLI for Panorama.
In the Hostname/IP Address field enter 10.10.90.30 and click Open.
If you are prompted with a screen saying Accept, Connect Once or something just click Accept.
Credentials are your regular Panorama Username and Password
Once connected paste this into the terminal:
configure set deviceconfig system ssl-tls-service-profile LCSO Learn commit
This will remove the assignment of the bad certificate from the management interface.
You should now be able to get into Panorama and revert the bad changes.
If you still cannot connect, try an incognito window and clicking the advanced options button to force connection.