Acho que já encontrei uma boa descrição para corrigir o problema no chrome em este site :
The site asks to download Flash
To the left of the web address, click Lock Lock or Info Information.
To the right of "Flash," click the Arrows Arrows.
Choose Always allow on this site.
Reload the page.
On your computer, open Chrome.
In the address bar at the top, enter chrome://components and press Enter.
Look for "Adobe Flash Player."
Click Check for update.
If you see "Component not updated" or "Component updated," you're on the latest version.
Go back to the page with the Flash content. If it doesn't open automatically, at the top left, click Reload Reload.