Display plugin entityreference is not available I'm not sure if this is a Views issue or an Entity reference issue, so I'm cross-posting here to see if I can find an answer.

I'm trying to export a view from my testing &amp; development site, to our production site, but I keep running into issues, and I'm not sure where I'm going wrong.

To the best of my knowledge I've got the exact same setup on both sites - modules are all the same, and all have the same versions for both Views and Entityreference.

However, when I try to import the view on our production site I get the following errors:

Relationship handler node.reverse_field_plan_document_attachment_node is not available.
Display plugin entityreference is not available.
Relationship handler node.reverse_field_plan_document_attachment_node is not available.
Unable to import view.


I'm stumped. I have no idea where else to look. I'm assuming it's a simple issue with a setting somewhere, but I can't find it. Everything works perfectly without issue on our testing site, and doing wholesale database swap is not an option.

When I go to create a new view on our production site, I don't even have the option to add an entity reference display:



Initially, I tried to use the features module to move the feature set from the testing site to the production site, but that was an enormous mess. I completely uninstalled the features module, and all the modules I created with it in effort to try to get this stuff working. After uninstalling all that stuff, I'm still left without an option to even create an Entityreference display with Views, and obviously cannot import my view either.

Can you help?
So - after getting another pair of eyes on this the issue is resolved. Somehow, the entityreference module was only partially installed and was missing the views directory (along with a couple other things) but was otherwise fully functional outside of the issue as described above. 

Not sure how the module would be working for other purposes, not throw any errors at all without those directories but that was the case. 

Thanks to Matt Glaman for the help tracking down the problem.