pull a link based off a forms response

[mikey-stockton]

I am currently trying to get a flow to have it when a form is responded to that the flow searches documents for a file with that name and then attaches the file back to the person in a view for example if they input as one of their answers 21552962, the document would search for file 21552962, and attach it. However when I am doing this the error message I keep getting is "The listitem id provided is not in the correct format". Can anybody help? the file is currently as a jpg file

[Monkeyman]

Screenshots please