One or more tables references a dynamic data source

I've created a custom function bellow:

And them invoked this custom function in my column [UrlIntrnadeEspaçodeTrabalhodeProjeto] on my table 'Rates'.

The result was this one bellow! Worked! 

However when I go save my dataflow appear the current error for me: "One or more tables references a dynamic data source"

Can anyone help me?