[Unable to access instance]

Has anyone received the following error when trying to connect.

The public certificate used for signing the assertion is not known to the service provider NOTE: If this has been working and has suddenly stopped, the most common cause for this error is that your Identity Provider signing certificate has expired and a new one was auto generated (a common configuration for Microsoft Active Directory) but no one has updated Hornbill with the new certificate.

 

I was connected and the service was working correctly. I restarted my computer and when I tried to log in to the instance, I received this error message.

[Error when trying to access service manager on new device]

Thank you I assumed that it was on my side but wasn't sure what. Thank you I will ask about the AD to our IT team. 

[Error when trying to access service manager on new device]

I was trying to access our company's service manager on a different device than I normally use and received the attached error.  The device is connected to the same network as my regular work computer and should have all the same settings. Would someone know what would cause this error?