File ID invalid when working with Get file content for OneDrive

[kensley]

I need help understanding why file id is invalid when we are working with the "Get file content" component in a flow, which in my case connects to OneDrive.  Here is my original setup...

The Id formula used in the File field is a custom expression....

items('Apply_to_each_to_loop_through_Photo_Cover_array')?['id']

When A user submits the original Microsoft Form which I created, and adds an attachment (the photo cover image), it all comes back to this flow.  The flow at the moment is throwing the following error...

But when I submit a form that invites the user to submit a photo, it connects back to this piece in my flow, but throws the following error...

My question...why is 1 or 2, or even 10 as the file id, invalid???

Many thanks on helping me understand this fully.

[kensley]

Within my flow component "Get file content from OneDrive for Photo Cover" is the main issue.  That value I have set for the File input is :

I have a feeling that value is incorrect, but not sure what to do next?  What should this File value be in theory? an ID value? a binary of the actual image attached? a path? 

Many thanks on helping me get closer to solving this!  

[kensley · Accepted solution]

Solve my issue by using a Compose process, to detect what the id value is of my array item like so...

items('Apply_to_each_to_loop_through_Photo_Cover_array')?['id']

... and assign that id value to the value for File: