Solution: Get Prezi past your security settings
Prezi will not work correctly if it is blocked by your security settings, an ad-blocker, or your company’s firewall. To allow Prezi through your security measures make sure that JavaScript, cookies, Flash, and pop-ups are allowed for the following:
*prezi.com
*.prezi.com
*.static.prezi.com
*s3.amazonaws.com
*.prezi.com.s3.amazonaws.com
*prezi-a.akamaihd.net
*.cloudfront.net,_
*.preziusercontent.com
The Prezi Classic Editor runs on Adobe Flash. You’ll need to enable Flash in your browser or else your Classic prezi won’t work. Also, be sure you are running the latest version of Flash.
If it’s your company’s firewall that is blocking Prezi, you’ll need to get your IT department to make some of these changes for you.
Other potential Prezi enemies are ad-blocking extensions like Ublock and Adblock. Either disable these extensions while you use Prezi, or go the extension’s settings and whitelist the files listed above.