Worked perfectly well for me on PS5 on US. Here were my exact steps and observations (I skipped some PS4 steps because I already had the PS4 plat):
1) Resign BOTH manualsave0 and manualsave1 from file link.
2) Reregion both to manualsave0 and manualsave1 on local save data.
2.1) select EU...