Cooking failed v4.12 preview 3

Looking at your packaging log, the first item after the Warning/Error Summary is: LogLinker:Warning: Can’t find file ‘/Script/HelloNeighborReborn’

Is this an asset that was or is being used in your game?

Here is a link to a user’s post where they were experiencing a similar issue and what they did to resolve it:

“Can’t find file” of unexisting asset (package fail)

Let me know if this information helps you resolve the issue.