app from the original "grand-stack-starter" repository (api) is written in the console
"GraphQL server ready at http://localhost:4001/graphql",
but the browser returns

Check and make sure which version of the neo4j driver you're using. I recently started a new project with the GRANDstack and needed to make sure that I had included some new code:

var driver = _neo4jDriver["default"].driver(neo4jURI, _neo4jDriver["default"].auth.basic(neo4jUser, neo4jPassword), {
  encrypted: development ? "ENCRYPTION_OFF" : "ENCRYPTION_ON"

Now the driver requires an encryption status. At least it does with Aura, the sandboxes might be the same.

port 4001 was occupied by another application (torrent=))