Hi @Mohamad Shokor: Hope you done a re-login after adding the role. Please make sure you are in the right access group if you have more than one access group.
Adding PegaRULES:DatabaseAdministrator should help to enable Query runner. If you are still getting the issue, please check if there are any custom implementation in your application for pzSystemMainMenu which is blocking this.
Please login again after adding the role. Try with an incognito session if its a caching issue. Check if your operator is pointing to the correct access group if there are more than one access groups present.
Else please raise a Pega ticket for more assistance.