Technical Error in Prestashop 1.5

[prakashbhandari]

Hi,

 

I'm not sure if I'm posting in right section of the forum and please let me know if I'm not. With my problem I'm getting a Technical error randomly and its happening in few computers. I was able to generate this error randomly by clicking on header and sidebar links before the page fully loads or by double clicking and its very random so it appears sometimes and doesn't other times. The url to the site is http://madexplaster.com.au/.

 

Thanks in advance.

 

Cheers!