You can use the "Scan" function by sketching on a plane normal to your curved edge and then making a fillet between the 3 faces. On the other hand, you have small radii (R0.25 and 0.5 fillet). Are these rays necessary from the beginning in your sketch1? As a general rule, it is better to reserve this function at the end of the design and to perform a "Leave" function. View attached file (SW2016)
As @jmsavoyat rightly pointed out, the problem comes from the holidays, which are in the outline of the first function. By removing them, a simple chamfer function on the 2 edges passes without any problem.
All you have to do is redo the leave last with the appropriate function.