Hi my prezi wont let me edit it and I have to presnt it TOMORROW MORNING! Please help

I access my prezi through a school where I teach and they have all worked before fine. However, I tried to open this one today and it fails to load and a error on page sign appears in the bottom left hand corner. The page just stays blank. When I click the error sign it says:

‘console’ is undefined


Code: 0

please help

Thanks for the response, look forward to hereing from you