Not enough space!?

Hi I've deleted all other presentations except one and on my account it says I have used 0% of 100MB however I cannot upload a video due to lack of space on my account. Please reply ASAP as this presentation has to be completed tonight. I also get this message:

Technical details:
id: 2540 the reason is: RequestS3UploadToken

Thanks in advance,
taranjotkohli1@hotmail.com is the account linked to my prezi