Issue with documentDownloadLink

Hello [mention:74edcde47e734df8a3f1ea67013709ed:e9ed411860ed4f2ba0265705b8793d05] 

There is no issue in your code. Did you check if your item has valid data. Also did you check if you are indexing the correct field name. Also is this a record data?

Also as Mike has mention in your previous post have a null check to handle blank values. 

If yes, have you tried using

index(fv!item, recordType!recordName.fieldName,null)

Hi  [mention:74edcde47e734df8a3f1ea67013709ed:e9ed411860ed4f2ba0265705b8793d05] ,

There is no issue with the code.
But if you are getting error means, may be there is null value in the fv!item.document. So try to handle the null value 
Try if(isNullOrEmpty(fv!item),somedefaultimage,fv!item.document)
If there is no nulls and giving same error means try to use index instead of .document.

It sounds like the document that corresponds to "fv!item.document" doesn't exist in the system. Make sure all members of the array you put for the "items" parameter of a!forEach() has actually a key called "document" and each value that corresponds to this key is a document that exists in the application.

 [mention:74edcde47e734df8a3f1ea67013709ed:e9ed411860ed4f2ba0265705b8793d05] I would suggest you to validate is document present in the system for each iteration.