Rasmus,
Please refer to my post on the Cisco IMC in your other posted question.
In regards to your error shown here..
I have experienced this multiple times in my lab.
Option 1:
* Physically remove power from the DN Appliance. Let the power drain for about a minute or two
* Plugin power cable
* Access Cisco IMC
* Check all of the logs and clear the logs if the buffers are full
Option 2:
* this option is only available if you already enabled SSH access to the Cisco IMC
* SSH to the Cisco IMC
* Clear all of the log files
* Reboot the Cisco IMC
Another possibility is the Browser, If you are using Chrome or MS Edge, try Firefox. There have been some browser related plugin issues that come along as you update your browsers.
### Workaround that I have used that has worked
* SSH to Cisco IMC
* Run the following Commands
scope http
show
set enabled no
commit
set enabled yes
commit
set http-redirect no
commit
* Try to access Cisco IMC from Browser again