If you are trying to get issues that are not task or subtask try something like "issuetype != Task or issuetype != Subtask"
If you want all issues other than both try "issuetype not in (Task,Subtask)"
Error is due to the issuetype not mentioned, you cannot give the value continously.
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events