Magento 2.1.11 CE ADD TO CART is stuck on ADDING ...

[Baracuda011]

Preconditions

1. Magento 2.1.11 CE (upgraded from 2.1.3)
2. PHP 7.0 on CentOS 6
3. Block HTML and Full Page Cache disabled
4. Redis cache disabled
5. Memcache disabled
6. Varnish not installed on the server

Steps to reproduce

1. Click ADD TO CART from the home page products grid
2. Click ADD TO CART from category page products grid
3. Click ADD TO CART from products details page

Expected result

1. Product should be added to cart like before the upgrade

Actual result

It's adding it indefinitely. Also, no console error, and nothing in REPORTS and LOG folders on the server.

This is a screenshot from the home page. Same thing happens from any where you can add product to cart.

Empty popup does not appear every time.

[RahulBhut21]

@Baracuda011 check the Javascript or jquery error in console and networking tab

[Baracuda011]

@RahulBhut21 thanks for the reply, but I already mentioned in the ACTUAL RESULTS there was no console errors.

[Baracuda011]

Just to update my observation. What happened just now is that after blank popup appeared, I got following JS (/Magento_Customer/js/customer_data.js) error:

customer-data.js:86 Uncaught Error: [object Object]
at Object. (customer-data.js:86)
at fire (jquery.js:3232)
at Object.fireWith [as rejectWith] (jquery.js:3362)
at done (jquery.js:9842)
at XMLHttpRequest.callback (jquery.js:10311)

    getFromServer: function (sectionNames, updateSectionId) {
        var parameters;

        sectionNames = sectionConfig.filterClientSideSections(sectionNames);
        parameters = _.isArray(sectionNames) ? {
            sections: sectionNames.join(',')
        } : [];
        parameters['update_section_id'] = updateSectionId;

        return $.getJSON(options.sectionLoadUrl, parameters).fail(function (jqXHR) {
            throw new Error(jqXHR); <= here (line #86)
        });
    }

[magento-engcom-team]

@Baracuda011 , thank you for your report.
We were not able to reproduce this issue by following the steps you provided. Please provide more detailed steps to reproduce or try to reproduce this issue on a clean installation.

[magento-engcom-team]

@Baracuda011, we are closing this issue due to inactivity. If you'd like to update it, please reopen the issue.

[michapietsch]

Right now I experience this behavior in v2.2.3 on two systems:

• one set up via composer create-project, bin/magento sampledata:deploy and bin/magento setup:install
• the other using the zip file with sample data and the web setup wizard

No errors in the Network tab or on the console. Requests finish successfull. The basket is still empty after a page reload.

PHP 7.1 and Apache 2.4 on MacOS.