Erik Kostson
Ansys Employee

Please read through my post carefully - we can not use symmetry so do this instead which is equivalent to a symmetry condition:
So add a Displacement boundary condition (BC) as shown in the image below, and then restrain the displacement (set it to 0) in the direction perpendicular to these symmetry faces (just as shown in the video above in the previous post). Finally you need to have 2 Displacement BC, one for each symmetry plane.
So use displacement
Also search the internet to understand what a symmetry BC is (just restrains degrees of freedom that are/move perpendicular to the symmetry plane - so for 3D elements either UX,UY, or UZ) - see this video for a simple example:
Thank you