As Aayushi mentions, a dataview ALWAYS requires an object otherwise it will either bork or be not editable like yours.
In the situation where you create a new ticket, you need to create a file as well. Which isn't possible with the default create button.
Therefore you need a microflow. Example below.
NOTE: please rename your entity Files to File. One File per Ticket. Now you have one Files for a ticket. Thank me later ;-)
You have to create an object of files and pass it in dataview. In file document dataview you can select microflow as datasource and create object of files entity and also check access rules on entity.
Hope it helps..