Sims Launcher error...

When I open the sims launcher I get this error: 

"A Runtime Error has occourred. 
Do you wish to Debug? 
Line:1507 
Error:'length' is null or not an object" 

I clicked no a few times and yes a few times, but this error keeps popping up. 
I don't know what to do anymore, I uninstalled the game and installed it again and it didn't help, I restarted the computer but nothing seems to work. 
This message prevents me from adding to my game stuff from The Exchange.. 
Anybody knows what to do??