I seem to be having the same issue but have not come across a solution. I am running an iMac with Big Sur, Adobe Photoshop 2021 CC When I select New Layer & Output Mask as output from Portraiture 3 the changes in Portraiture are not visible back in Photoshop 2021. Occasionally a new layer and mask are produced, but this is about 1 in 30 attempts. If I select Same Layer for output, all changes made in Portraiture are visible - but no Mask.