WP Social Login doesn't work on Cloudways

If you've seen this error while trying the "WordPress Social Login" plugin and you're hosted by Cloudways, it is most likely not working due to the varnish cache. You have to exclude some cookies from the varnish, then the plugin should start working.

To do so, please go to your Cloudways account > Your Application > Application  Settings > VARNISH SETTINGS > Add the following rules (wordpress_test_cookie, wpj_is_iframe, un_unique):