Kibana GUI simple filter not able to get it work :(

I thought this was easy but after several attempt i wasnt able to get it working. We have a routine morning health check. i was trying to focus on errors or issue for the snapshot or agent logs but to no avail.

  1. For the snapshots i was trying to filter by jobs that is not complete state.

Kibana GUI >> stack management >> snapshot and restore >> snapshots

How can I filter for state column NOT EQUAL to complete?

  1. For the agents logs. I was trying to filter to show events that have error.message

Kibana GUI >> fleet >> agents >> "agent_id" >> agent "logs" tab

How can I filter for error.messages column NOT NULL?

Kindly advice. Thanks in advance.