Spurious load errors in Rails production

Spurious load errors in Rails production

In a large application built with Rails 4 I have been getting load errors in production but not development. When I check my production log there is no request received at the server. I have tried turning off data-ajax but the the resulting page will not load in Chrome. Does anybody have any ideas how to fix either of these errors?

I have just changed my front menu page from a multi page to a single page and so far the error has not been repeated but may crop up elsewhere. Every time i load my app to production it finds somewhere else spring the same error.