If insulation and plastering are done during the summer, when the house is heavily ventilated, insulation can be done before plastering.
In addition, in the case of diffusion-open roofs (membrane), the foam has the ability to drain any moisture it may absorb during wet work.
In general, Crossin Attic Soft foam has a low short-term absorption rate and quickly gives back absorbed moisture while retaining its properties.
Regardless of the order of the work, you need to remember to ventilate intensively after plastering to get rid of moisture at a rapid pace.