Add to cart stops working when enabling your plugin - Magento 2.2.7

[ktsour]

Hi, once we install the plugin, it fixes the problem with the payment gateway but when we try to add anything to the cart, it does not add it.

[HirokazuNishi]

Which version are you using? We applied 2.2x compatible version for our client websites, and no such report. Please share me more details and how to reproduce your case.

[ktsour]

Hi, we used 2.3.0 in magento 2.2.7

[HirokazuNishi]

Hm... Did you check add to cart request/response data? Also did you check Magento & web server logs?

[fysiosupplies]

We are experiencing the same thing.

Using magento 2.3.5-p2 with version 2.3.0 of cookie fix.

We have found that in chrome it does not have the PHPSESSID cookie.

-edit-
This is only on chrome. other browsers work fine

[HirokazuNishi]

@fysiosupplies does your Magento run only https? "SameSite=None" is only allowed with "Secure" attribute by browsers.

[fysiosupplies]

Yes. Our systems are all running on https.

[fysiosupplies]

We have found our problem. While our secure url's started with https:// and the browser used https://Our base url's still had http://.

In order for magento to use secure cookies all four urls need to be https:// in store -> configuration -> general -> web