hi @Y_a1 ,
This is a very old thread/post, it relates to 29.30, and could not be fixed, due to the age of the original island.
The error is “we-hit-a-roadblock” often means something different.
Often, this is an old island, and the simplest way is to open a new island to import all the assets
Possibly try an example
How to copy a UEFN project - Development / Getting Started & Setup - Epic Developer Community Forums
Migration is the only thing I tried
Found this
YouTube video
How to duplicate or copy a UEFN Project Easily! #uefn fortnite
This fixed the error for another user
If this does not fix this, open a new thread or search for the same error in the title of the thread