Whats this error?

[TraceyHand]

I've tried uploading and am currently refreshing the site but could someone please put a test order though Chariots On Hire (you'll not get far, from what I can tell!)
Sit'es been playing up since 4.30pm from what I can tell and id giving a script error page when you try to add to cart.
Addy is www.chariotsonhire.co.uk/acatalog
I've not even done any uploading or site changes since the error started (can pinpoint it to within 10 mins thanks to stock control mole running every 10 mins. It's failed since 4.30!)
Anyone recognise the error? (comes up when "proceed" button is selected)
Apologies if my refresh "cures" it and anyone finds no fault. Just need some urgent advice before you all knock off work (yeh right! )
TIA, Tracey

[rmladden]

Worked well for me. I got through the entire order process. You can discard order TT2Q2210000027.

[TraceyHand]

thanks Bob.
Seems something fixed it along the way (although I didn't do a full refresh in the end, had to disconnect from the net!)
Thanks again
Tracey (who really must now ask about an email problem but that will have to wait til tomorrow!)