The User-input drop down list will come based on what User-Input query have you given. Go to Edit workflow -> Setup ( top-left ) -> User Inputs . Locate your variable Array and open the Edit Variables : Array. In Query section, find and Test your query. If its not returning anything, you Workflow will as expected not show any drop-down list at execution time. See if this query is correctly written and returning the data that you want.
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Now following on the user inputs has the following Query syntax for the Name Array;
array.name AS 'Name',
array.ip AS 'Primary Address',
array.os_version AS 'OS Version'
array_id = array.id
AND license = 'SnapVaultPrimary'
Not sure if I am looking in the correct place. But should be simple to query Array Name and looking at the above syntax (i am no programmer) the code is there. But still nothing appears in the array field as in the screen shot above.