Error id:1200 #2048

Please help:

I was able to use Prezi two days ago (8/5/2014) and able to edit, view, everything. As of yesterday (8/6/2014), this error continues to show when trying to edit my presentation:

Technical details:id: 1200 the reason is: [SecurityErrorEvent type="securityError" bubbles=false cancelable=false eventPhase=2 text="Error #2048"]

I have updated my flash player to the most recent, and I am not sure what else to do.

Please advise as soon as possible. Thank you.