Solidworks error while trying to solve a very basic simulation

Hello, I probably do something wrong running a solid FEA simulation on an aluminium rail.
I got the error attached whan the simulation is running. No error occur with the mesh, only when running hte simulation. I got a result, but it is probably wrong due to the error message received.
I deleted the symmetry, same error, increase the mesh definition, same error. I often got a mesh failure when creating the mesh, but not all the time, so maybe sometime the mesh is not good even if I don't get the mesh failure message?
I attached the part in SW2021 in case someone got the time to have a look.
Any idea how to solve it?
Thanks