I see no answered questions about this so either nobody creates custom guides to :PLAY or the solution is so obvious that it would take a real newb to miss it.
Currently using 3.x Community Edition - so if this is an Enterprise only feature will install that and try again.
Have set up what I believe to be the appropriate permitted locations in neo4j.conf:
Have set up an S3 bucket with appropriate read permissions and what I believe to be a correct CORS setting:
I know it is seeing the file because if I change the name it says it "can't find anything about that", I can get the file down from AWS so I know the read permissions are correct, but I get TypeError: FailedtoFetch.
I thought it might be HTML content problems (created with AsciiDoc) so I did a simple "Hello World" HTML page which received the same error.
I know this has to be a newb mistake but I can not find anything relevant online or in the manual. Have spent more time on this than I would like to admit and am ready for the newb walk of shame. Help!