Remove Item from Minicart throws Invalid Form Key error in Magento 1.9

Question

I had installed a fresh setup of Magento ver 1.9.3.9 and when I add the product to cart and click on Remove Item from Minicart it gives me exception error and page goes to There has been an error processing your request

When I checked my var/reports it shows this error:

"Invalid form key";i:1;s:1012:"#0 /public_html/app/code/core/Mage/Checkout/controllers/CartController.php(641): Mage::throwException('Invalid form ke...')

I had again download the fresh zip of Magento 1.9.3.9 and again integrated the app/code/Mage/Checkout module by disabling previous one. But still it gives me the same error.

Answer 1

You can increasing the following PHP settings (php.ini) for doing imports:

Error cause:

post_max_size = 128M

as suggested in some articles about import...

After setting them back to default (64M)

Solution:

post_max_size = 64M

and ,naturally, deleting all the cache folders under /var/cache/, everything went back to normal.