Trump agreed to sign a clean CR. Senate passed a clean CR. Ryan's House passed a dirty AF CR because Trump said he would no longer sign the clean CR. Pelosi's House passes the clean CR that the Senate passed.
Trump and McConnell are the ones who are holding things up because they changed their minds. You don't give in to someone who cannot be trusted to stand by a previously made bargain.
So no, it's not Pelosi and Schumer's fault at all.