I am new to Neo4j and want to implement a graph database into a Drupal website. For this implementation I use this model: https://www.drupal.org/project/neo4j. The Neo4j server is hosted on an Amazon Web Server. When installing the module in Drupal and connecting to Neo4j it gives the following error: "the website encountered an unexpected error. please try again later." and the whole Drupal site crashes.
Anyone had the same issue or knows what could be wrong?