Help to resolve the "Unexpected error"

Hello Everyone,
I have been trying to create a dashboard on Grafana and learning Grafana has been a lot of fun but its speed of processing and saving changes is very slow and sometimes it does not even save those changes. I have been very stuck and unstuck and now again stuck. I was trying to add a new panel to my dashboard and then I got the error saying,“An unexpected error happened”, it is not even letting me open the dashboard. I even tried refreshing the dashboard but it is not working. I am so confused.

I would really appreciate if someone could help me with this.

For reference, I have attached the screenshot above.

Hey there, I am having the same issues, but it happens when I wanted to view the JSON of the panel. Mine is running on Grafana Version 8.4.1.