Hi Cristian,
Thank you for your reply . Yeah I tried with cache clear ,Ctrl+F5 with different browser but its not working. Basically in my case the code is not yet uploaded at all for launchpad yet. I am yet to create a site under Site Management. So i can't start the site management itself right now 
.
Anyone from SAP can help me out with this please , my trial account details are given as above.
Thanks