I am currently working on a project and It's time for me to host both the application and my graph database. I have chosen heroku and I have been able to deploy my application, add an add-on (GrpaheneDB). Now I would like to migrate my local dataset on my online database. I have been searching for two days now.
Every time I try restoring the database, I get this error: 
To quote from GrapheneDB's troubleshooting section for importing: