Error deploying a Neo4j app on Heroku

[kapso]

I am getting the following error when deploying my Neo4j app on Heroku -

NoMethodError: undefined method `zero?' for nil:NilClass

neo4j-core/lib/neo4j/core/cypher_session/adaptors/bolt.rb

Line 158 in ec1e02a

if agreed_version.zero?

This is the neo4j.yml

staging:
  type: bolt
  url: <%= ENV['GRAPHENEDB_BOLT_URL'] %>

GRAPHENEDB_BOLT_URL = bolt://user:password@server:24786

Runtime information:

Neo4j database version: Neo4j Community Edition 3.4.4
neo4j gem version: 9.3.0
neo4j-core gem version: 8.1.4

---

UPDATE: when I switch to http as the protocol, I am able to start the Heroku app and everything works.

[cheerfulstoic]

Hello @kapso. The problem is likely the Bolt protocol over SSL. That is supported in the master brand of this gem, but it hasn't been released yet because there was an issue found with it. I'm not sure when it will be able to be released, though you're welcome to try it.

As you found you can still use http just fine

[kapso]

@cheerfulstoic thanks for the quick response, will use http for now. Look forward to the bolt release/fixes. Thanks.