Do you have still the issue after the latest patch?
At first, clear your browser cache and/or try a different browser. You should make sure that you log out of Battlelog and start the game from Origin after. Reinstall your webplugins for battlelog as well as your ESN sonar application. Get sure that you have disabled all ad and application blocking software in your browser and using the latest version of Adobe Flash. Update Direct X and Microsoft .NET Framework.
Please let us know, is the issue still happen and accept if this helped you to solve your problem.
Cheers
Basti
