first of, you gotta use the wars editor as we don't support vanilla Crysis anymore.
..... and it worked after failing to load tons of different resources.
sounds like your editor is not set up to work with the mod.
it is actually not loading the mods files on startup which is why it throws those errormessages.
in order to load the mod into the editor, locate the Editor.exe in the bin32 or bin64 folder of your Crysis Wars installation, and create a desktopshortcut. Rightclick the shortcut, and select properties, then add -mod mwll
to the targetline, so it looks like this:
"D:\Games\Electronic Arts\Crytek\Crysis Wars\Bin64\Editor.exe" -mod mwll
that should fix your problem...