Theme Not Functioning Anymore

Hi there, as of yesterday my theme seems to of broken and is functionality has become a little strange. I haven’t made any recent updates or major changes and was looking perfect before the weekend – I came in this morning to a message from the client alerting me!

Can you please take a look to see if it is a theme issue, visual composer or other issue?

For me these are the issues I have noticed:
– Home slider not showing
– Home images not displaying (anything that uses an intro animation)
– Filters not working in product categories
– Sidebar widgets not functioning/displaying correctly
– Ajax search has stopped
– Sliding navs have stopped (mobile and cart)

Please help!
Thanks very much