"cannot locate package" in cydia

So I am able to see cydia now after restarting my device but any apps I pick (even the ones on the cydia front page) says "cannot locate package".

I didn't edit my sources. I can see:
Bigboss repo
ZodTTD & MacCiti
I've restarted my device hoping it'll do the trick but no help there.

I searched the net but nothing useful came up. please help. thanks! :)