Mercury error

http://prntscr.com/68s0r1
i've been trying to fix this for 1 day now. any idea what is causing this?

Can you post what's on GiftWrapper.cs line 29? Seems like something related to a gifts table isn't in correct data type.

Got it to work but it only shows this http://prntscr.com/696r41
and i'm having errors debugging it so it isnt working to debug it.

What errors are you getting when you debug it?

I get this http://prntscr.com/696wct , but then i tried another one and i get this http://prntscr.com/696x4j
and it is a clean database, am i missing anything? http://prntscr.com/696xeo