try{
here ssjs code to update the master profile data extension(that is updating perfectly)
if (result>0){ // after updating I am getting value of result 1.. I have checked that.
Platform.Response.RedirectTo(thankUurl);
}
}catch.......
Issue is that: after I clicked the link in email it's directly redirecting to thank you page with out showing the preference center. If I take out the redirecting code then it's working /updating perfectly. I tried just using text message instead Write ("updated"), but its shown even before updated. How to fix it? I want that redirecting portion to execute after execution of the update. Thanks
Mateusz Dąbrowski (mateuszdabrowski.pl) 
Forum Ambassador
Two things:
1. If you want to process the change on the click and show the thank you or error page right after it, I would consider using a single Cloud Page that has SSJS for processing and, based on the result, displays the appropriate message on the same page. No need for a redirect.
2. If, due to some business requirements, you need that redirect, you will need to move it out of the try/catch block, as due to a bug, redirect within try/catch errors the page out: https://mateuszdabrowski.pl/docs/ssjs/debugging-ssjs/#global-error-catching
