product Search suddenly does not work anymore

[ereallstaff]

Hello everybody, Don't understand why, the product search suddenly did not work anymore

No updates done ( I have the terror of update ) of joomla or virtuemart, and seems no change manually to the code

www.modacalcio.it

I have tried also with default template and result is same

May I have done a misconfiguration or what may cause this?

Thanks