I am working on a Magento 2.1.2 project, theme Porto. I installed the MageMonkey extension for Mailchimp integration.

I strugle with displaying the messages of successful / unsuccessful subscription to newsletter on the homepage. On local, everything works as intended but on preprod server the afterRenderResult() method of Magento\Theme\Controller\Result\MessagePlugin is not called, so no mage-messages cookie is set.

On preprod if I visit another page, the messages are displayed.

Has anyone had this problem ?

I even have deployed a preprod database on local thinking that the problem is in the database.

Maybe it is a caching problem ?

  • After you created the plugin, have you deleted your var/di and var/generation directories? – Shawn Abramson Oct 21 '16 at 17:29
  • @ShawnAbramson of course. Everything in var/ and pub/static/ – Marin Bînzari Oct 21 '16 at 20:56

Maybe you return json response.

I also have problem with it.

I find initial commit when add MessagePlugin https://github.com/magento/magento2/commit/541ec806cae729df118b7844f5d105cbf1a6cec6

This code check is your response is not json

if (!($subject instanceof Json)) {


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