Hello
This is a very common issue happens due to some optimization plugins.
for ex: autoptimize, Litecache etc.
please disable those plugins and then check if the slider is working or not.
if it is still showing the problem then please mail us your wordpress details we will need to check the issue
Thank you
Hello
We have disabled few plugins on your wordpress which was causing this issue, there were multiple plugins creating this issue, please check now.
Thank you