I wanted to use Cura 4.0 with my Makerfarm Pegasus 8" printer. I upload my file and everything seems fine then after my print starts, the progression bar shows it has completed 25-30% of the printing even though it has not even started the first layer. Also, my first layer never sticks on my plate. It seems that Z axis is higher even though my bed height is optimal. I also have Cura 2.6.2 and it works just fine.