testimonial and brand scrolling not working

[tajrean]

I changed the default testimonial with my  own clients testimonials but doesnt show up. Also the brand scrolling is looking wierd. How to fix this?
When hovering at "HOME", the options doesnt pop out?

[Basara]

Looks like some javascript error occur. Thats why brands scroll is not working. Open your browser console to see is any js error

[tajrean]

open the browser console   how?   

What does this mean?

[Deprecation] Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.
send @ jquery-1.12.4.min.js:4

[Basara]

For google chrome console overview https://developers.google.com/web/tools/chrome-devtools/console/