My LOTRO patching failed (FTP patch worked for me, the next one did not) a while back.
Further patching did not work, I went on to another game.
This time around the fixing went pretty easy.
1) installed the newest PyLOTRO via C4P.
2) patched for an hour.
3) first attempt resulted in the Finished message.
4) (re?)installed the Direct3D Runtime Modern.
5) second attempt worked perfectly.