Magento 1.9 not able to save upsell/related/cross sell products

Question

I upgrade my store to last Magento version 1.9.2.4 and I add ssl, When I try save a new product or edit an existing product in Magento everything is saved correctly except upsell/related/cross sell products. Product is being saved with no errors. In var/log/ I don't have any errors. If I hit edit again the upsell product I selected before wasn't saved.

Update:

I try to turn off the https and now upsell/related/cross sell products can be selected from admin product page, what I can do to solve this, to work with https?

My server is on nginx and to work my store with https I add this in index.php

foreach (array(
    'SERVER_PORT' => 443,
    'HTTP_X_FORWARDED_PROTO' => 'https',
    'HTTP_CF_VISITOR' => '{"scheme":"https"}'
) as $key => $values) {
    if (isset($_SERVER[$key]) && $_SERVER[$key] == $values) {
        $_SERVER['HTTPS'] = 'on';
        break;
    }
}

Answer 1

I am guessing that you are using Google Chrome so you might want to try firefox. The upsell, cross sell, and related products tabs are loaded via ajax and due to the way different browsers handle javascript, it doesn't always submit ajax loaded content with the rest of your form.

For example, click on the Upsells tab, dont change anything, and then click save. After you have clicked save, make changes to the upsell tab and click save again. It should then save your changes. I know that's a pain to do but I have also had this issue in the past and this worked for me.