Presumably test.json is located in your import diectory, i.e. that which is described by conf/neo4j.conf and dbms.directories.import ( Configuration settings - Operations Manual ).
What version of Neo4j? APOC?
Is Neo4j running on a linux server. Is the file readable by the same linux OS user that the Neo4j database is started as?
Every time I've hit this it's a permission issue. Make sure the account that the neo4j service is running under has read permissions on that folder path and file. What you're seeing in firefox is potentially connected as a different user (yourself).
Have you tried
LOAD CSV with a delimiter of
\u0000 (ascii null) to ensure it can be opened via neo4j?
How do I see if neo4j has read permissions on that folder and file. I have these commands enabled:
a OS user started the Neo4j database, i.e. presumably it ran
bin\neo4j start or similar.
Does this same OS user than started Neo4j have read permissions against the file test.json?