http://be.sponsorpay.com/assets/web_client.js

Same problem for us. The script error keeps coming when we try to start the game. The game wont launch, in fact the pc screen just goes black!

The not starting is usually not connected to the message. Please open your own thread.

Here's some guidelines: http://answers.ea.com/t5/The-Sims-3/READ-FIRST-Help-us-Helpers-to-Help-you/td-p/255562/ on what info to post

What worked for me was uninstalling and reinstalling the Origin client. 

This is my first time posting, sorry if I responded to the wrong person. 

Is there no solution yet. people were having this issue 3 years ago. Now its me... so its personal........

This is happening for me also. The game is lagging so bad I cannot even use the color changer on the objects and the other night it slowed and then crashed. Is there no solution, as this shows up every time I l try to play?