Help!

Tried the "Creamy Chicken Stew" which I think was in chatter #2 or 3?
But the liquid all seperated... so it all looks erky. Tastes good still, but ...

Any ideas?

I mixed the plain flour with the evap milk properly, and I did use chicken stock cubes (x4) to make up my 1l of chicken stock so may that have been it?