Page not found. Refresh the page or try again later. If the problem persists, contact your Portal administrator for assistance

Hi Experts,

We are upgrading the Portal system from 7.0 to 7.4 . and we are using the ESS/MSS .

we are trying to accessing the any application like ( leave request ... etc) we are getting the below error "

Page not found. Refresh the page or try again later. If the problem persists, contact your Portal administrator for assistance".

any body please help me how to resolve this issue .

one observation i have found . we are unable to see the below business package into portal system ." 

This is the issue related with Business package or any other . Please help me .

Thanks & Regards

V.Punna.