Cannot Add Product to cart

Question

Whenever I tried to add product to cart from list page or product page in fresh setup Magento Ce 2.1 release it redirects to checkout page and no product gets added.

I tried disabling cache also.

Answer 1

If you ran in local and your path is :localhost please replace "localhost" to "127.0.0.1".
Following:
So you can change root URL by SQL query:

UPDATE core_config_data 
SET value = 'http://127.0.0.1/' 
WHERE path IN ('web/secure/base_url', 'web/unsecure/base_url');

It is sufficient for Magento 1.x but not for Magento 2.0. Magento 2.0 for some strange purpose additionally stores root URL in the third path: design/head/includes

The record looks like:

<link  rel="stylesheet" type="text/css"  media="all" href="<root URL>/pub/media/styles.css" />

So you need one more SQL query:

UPDATE core_config_data
SET value = REPLACE(value, '<old root URL or domain>', '<new root URL or domain>')
WHERE path = 'design/head/includes';

For example:

UPDATE core_config_data
SET value = REPLACE(value, 'http://localhost/', 'http://127.0.0.1/')
WHERE path = 'design/head/includes';

Then delete the cache:

rm -rf var/cache/*

Answer 2

Those who don't wish to change the localhost url and doesn't want to add vhost for this problem. Here's the quick fix.

The problem is due to form_key mismatch. The form key which gets posted during add to cart action is getting mismatched with store session form key.

Go to

vendor/magento/module-checkout/Controller/Cart/Add.php execute()

method. and comment out the first If condition.

**NOTE:**This is not a recommended solution for Production environment.

Answer 3

I am using Mac and I faced this issue using localhost as URL for Magento 2 instances. This is a quick fix if you made a new instance and/or trying to debug something quickly...

Following this answer posted above in this thread fixed my issue.

Answer 4

Sounds like it could be a session based issue, are you able to log into the magento admin or a customer account?

Anything in any of the logs pointing towards the add to cart functions?