The Stokes flow demo (Stokes equations with Taylor-Hood elements — DOLFINx 0.6.0.0 documentation)
solves the lid-driven cavity flow in four different ways with different solvers.
First two of them seem to work fine,
but the last two solvers (monolithic block direct solver, non-blocked direct solver) fail for some reason I don’t know.
May I get some comment on how to fix this issue?