Feed 404 Errors

Before you say this has been dealt with before, please read the whole issue.
I have Google’ed and Stackoverflowed myself to death on this.

In WMT I see 404 errors for /feed on specific posts. e.g. htt://mydomain/thispost/feed/
My feed is working fine for pages and categories but there is this ongoing 404 error for a feed on indivual posts.

I thought to block /feed in robots.txt but then all feeds will be blocked and I dont really know the impact from a SEO perspective.

Can someone please give me a solution or direction.

By the way my site is using WPML and WP SEO (Yoast)

Thank you in advance

For all those who might hit the same problem, here is the solution:

Disable in Yoast the “remove category” option in advanced section.
Then install this plugin: https://wordpress.org/plugins/remove-category-url/ ( do use any other plugin as this one works – yes, I tried them all)

For some reason the Yoast solution and all other plugins don’t allow accessing the /feed/ url in any language besides the default language of WPML.

Hope this will be useful someone out there..