Dashboard was not saved. Error: Forbiden - come and goes

HI,
Started using kibana two weeks ago. I had the error pop to me last week:
image

And when i came the following day, I could once again save my visualizations and my dashboard...

Now it's happening again. I saw it could have something with not enough space and checked that, we have only 40% usage.
Also, we dont have any user/role in place.

What other reasons could make that happen?

Kibana version: 7.6.1

Hi @GilKor

Could you provide Kibana server logs for the time you got this error? You can also check if there are any errors in browser console.

Regards, Dzmitry