I recently migrated from DNN 4.5.5 to 5.5.1 and everything seems to be working fine. Problem however started when I published the upgraded protal and decide to deploy it. The problem is that some of the links or labels on the Portal are no longer visible. Examples are the Username and Password labels on Login Page. Also affected is the All, Online and Unauthorised links on the User Accounts module. These and may more other features are affected. Can someone please help on how to resolve this?

Yes I tried this in both the edit and non-edit mode and it was thesame thing. The first point of call is even the login page which doesnt render in edit mode. The Username and Password label are not showing on this.

I dont think it is about the server setting or authentication issue. This I know because when I deployed the published version on my development laptop, it does thesame thing. meanwhile if i deploy the raw source code on the production server, it works fine just like it does on my laptop.