Have to click button twice for ColorBox to appear.

Joomla 3.7.2, PHP 7.1, Eshop 2.5.5

Everytime I click on the "Add to Cart" button, the screen darkens but the ColorBox doesn't pop up until I click on the button again.

In the Chrome console, it gives me this warning:

jquery.min.js?f71aa77…:4 [Deprecation] Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check xhr.spec.whatwg.org/ .
send @ jquery.min.js?f71aa77…:4
ajax @ jquery.min.js?f71aa77…:4
n._evalUrl @ jquery.min.js?f71aa77…:4
Ha @ jquery.min.js?f71aa77…
append @ jquery.min.js?f71aa77…
n.fn.(anonymous function) @ jquery.min.js?f71aa77…
publicMethod.prep @ jquery.colorbox.js:679
publicMethod.load @ jquery.colorbox.js:885
launch @ jquery.colorbox.js:371
$.fn.(anonymous function).$.(anonymous function) @ jquery.colorbox.js:530
success @ eshop.js:56
i @ jquery.min.js?f71aa77…:2
fireWith @ jquery.min.js?f71aa77…:2
y @ jquery.min.js?f71aa77…:4
c @ jquery.min.js?f71aa77…:4

How do I fix this problem?

Thank you very much!

Best regards,

Jason Vuu

Dear Jason,

Sound like this is an outstanding issue. Please submit a new ticket to EShop and send me the your site information there so I can help you to check and resolve the issue.

Sincerely, Giang