Ok, sorted it out by following this thread
The issue was, I’ve added additional filter to dashboard by mistake.
I guess, I was trying to save dashboard, but added filter with same name as dashboard itself and saved it.
It was difficult to spot, because I thought, it is dashboard name, not filter!
One debugging tip:
When you get _msearch "Request Payload" it’s json in one long string.
To make it easier to read, I’ve formatted it with:
cat f0.json | python -m json.tool > f1.json
type f0.json | python -m json.tool > f1.jsonOr use any online json formatting tools.