Silverlight error during the update of program

Hello,
It seems like it doesn’t matter that I have updated Silverlight because I still have error which I cannot solve them. When I want to debug the webpage this error below appears again. Any solution for this error ? How can I solve this one ?
Thanks !

Webpage Error
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Line : 56
Error: unhandled error in Silverlight application code : 2104 category: Init.
