Why is JavaScript failing to load variants quickly on my site?

[aekido88]

Hello,

I seem to be having a coding error on my website where variants aren't loading as javascript is failing.

The variants load on my mobile straight away but take atleast 2minutes to load on desktop but I have no idea why or where this code would be found.

Could anyone be of assistance?

www.smashandpass.co.uk

Thank you