Recently we were getting the below error on the Omnichannel Ongoing Conversations Dashboard.
As the user was having an Omnichannel Administrator role, we expected it to work for the user. We raised a support ticket for the same and got to know that we need to assign the Omnichannel supervisor role for it to work for the user.
After assigning the Omnichannel supervisor role, the report started working for the user. Try it in incognito mode or clear the cache after assigning the role.
Get more details – Omnichannel Ongoing Conversations dashboard
Hope it helps..