Probelm was solved via Sen2Cor-02.05.05-win64 - AttributeError: 'L2A_Tables' Object has no attribute '_L2A_Tile_PVI_File' - #4 by Fabrizio_Ramoino
So I still cannot figure out processing it with sen2cor in SNAP GUI but it worked with command line. Also trying to reduce the number of subfolders in the path where the .SAFE is stored.