undefined method namespace_inheritable

[nickurban]

When trying to view an endpoint.

undefined method `namespace_inheritable' for #Grape::Endpoint:0x0...

Grape::Formatter::JSONAPIResources.build_options_from_endpoint grape-jsonapi-resources (0.0.7) lib/grape-jsonapi-resources/formatter.rb, line 70

Grape was working fine with grape-entities. Perhaps this is a version compatibility problem? I'm using:

grape (0.7.0)
grape-entity (0.4.8)
grape-jsonapi-resources (0.0.7)
jsonapi-resources (0.8.1)

Thanks.