Magento 2.1 – How to Add Scrollbar to Minicart Dropdown Content

The missing step is you need to update "content.html" in mini-cart folder as well. I have resolved it in three steps:

1. Replace the minicart.phtml file from theme:
   • app\design\frontend\Theme_namespace\Theme_module\Magento_Ch‌​eckout\templates\car‌​t with the core template at:
   • vendor\magento\module-checkout\view\frontend\templates\cart‌​

2. Replace content.html file from your theme:

   • app\design\frontend\Theme_namespace\Theme_module\Magento_Checkout\web\template\minicart\content.html

With the core template version:

• vendor\magento\module-checkout\view\frontend\web\template\minicart\content.html

3. To make sure everyting has flushed out from the Front-end. Remove all files from:

   • pub/static/frontend
   • var/cache

Run deploy static content again: php magento setup:static-content:deploy

See Image Result minicart after fixed with the above steps.

Have you overridden or extended your minicart.js script?

2.1 introduced some changes to these files to resolve previous issues with the minicart values not updating on page load. Assuming you have overridden this file or extended some of its functions, you'll have to bring it in line with the changes that were introduced with 2.1.

Here's the commit with the relevant changes: https://github.com/magento/magento2/commit/eec3cf17bc5deae71c83c797d1339de46cf6905f Namely, cart() was replaced with call to new function getCartParam().

Hope this helps resolve your issue!