Got it!! (just had the same problem after updating from 4.3.2 to 4.4.2)

1 - go to settings - Apps - All - and open Google Play Store
2 - Click on "force Stop" then "clear data" then "clear cache"
3 - Go Back to settings - Accounts - and remove account and add it back again (available for KK) or change it to the same actual password
4 - Open market place and install a brand new app (never used before) and then install and update every thing you need :)
Hope it helps!

i9100 - CM11 KK 4.4.2
  gapps- kk- 20140105
 

Got it!! (just had the same problem after updating from 4.3.2 to 4.4.2)

1. go to settings - Apps - All - and open Google Play Store
   
2. Click on "force Stop" then "clear data" then "clear cache"
   
3. Go Back to settings - Accounts - and remove account and add it back again (available for KK) or change it to the same actual password
   
4. Open market place and install a brand new app (never used before) and then install and update every thing you need :)

i9100 - CM11 KK 4.4.2 
gapps- kk- 20140105