Cart not refresh when adding a product

Hi,

When you click on the add to cart button, the browser sends an AJAX request to the server, and based on the json data returned, it will refresh the cart module, display a notification popup, and/or redirect to the checkout. This problem here is that nothing is returned and thus nothing is done as it doesn't know what's going on.
If you look at the console of your browser while you click on the add to cart button, you can see this:
i.imgur.com/khXmy61.png
So the add to cart HTTP request to the server returns successfully (indicating that the add to cart has been done), but the response cannot be read back by the browser which leads to a ERR_CONTENT_DECODING_FAILED error.
Searching a bit online ( stackoverflow.com/questions/14039804/err...tent-decoding-failed ) this is indicative of an issue linked to gzip compression.
If you access the URL tango-express.ch/nos-produits/product/up...add-1/cid-1?tmpl=raw
you'll get the same thing as if you click on the add to cart button.
Normally, this should display in the browser some json data with information about the add to cart being successful.
However, nothing appears.
And if I check the network area, I can see that the request stays in "pending":
i.imgur.com/kI2ndFB.png
This means usually that the browser is waiting for the server to send back the data.
Looking a bit online about it, I found this page:
serverfault.com/questions/708319/chrome-...ts-get-stuck-pending
There is says that forcing the connection to close might help.
You can try by adding the line:

header('Connection: close');

public function updatecart() {

Hi,

What I wrote above are just what I could figure out looking at the situation on the new website.

But it's interesting that this works on another website on the same server and even that it works on the website with a different version of PHP.
So now the question is : what is different between both websites ?
Do you have extensions you installed on one and not on the other ? Did you configure some extensions differently between both websites ? Did you change the htaccess for one website differently from what you did on the other ?

The error in your log indicates that the server denied access to a page of the website because of either a htaccess or the configuration of apache:
serverfault.com/questions/801325/authz-c...keeps-denying-access
It could be linked, but it could also be unrelated. It's hard to say.
The best would be to look at the log before adding something to the cart and after and see if you get an extra message like this in the log at that point. That would confirm that it's linked to the problem and thus it would point at a configuration issue in apache.

Also, if changing the version of PHP fixes the issue, it's likely to come from a warning/notice/fatal error. So normaly, that should be logged in the PHP error log of the server. I would recommend you to look into it (the log you provided in the apache error log, not the PHP error log).

Hi,

Ok. Also, I would recommend sending a message to your hosting support to find out where the PHP error log is.
Even if it doesn't bring any information here, it's always nice to know where it is to have a quick look at it when you stumble on an issue. It can oftn lead to a solution.