I don't remember for sure, but I think this version on steam is broken. You need to fined the mod online, pretty sure the guy that made it Vex posted the link in one of his Youtube videos.

its because the game has updated since vechs made the mod and the mod is now outdated so it wont work

well ♥♥♥♥ same thing happend to me... really wish i'd read this before downloading lel D:

What worked for me is unsubscribing from the mod on Steam, downloading the mod from the different link in the description (the mediafire link), extracting the folder, and moving that to the modules folder in the Mount and Blade folder ( C:/Program Files(x86)/Steam/steamapps/common/Mount and Blade)
When choosing the mod on the first screen, instead of it saying Vexed native by Vechs, it says Vexed Native 1.154. Hope this helps because it worked for me.

that didn't work either....

There's a fix at the bottom of the download page:

SOLVED THE DOWNLOAD ISSUE. Subscribe first, and once it's finished downloading, open your main steam folder (c:/program files/steam and SEARCH for Vex. This will bring up a .rar file that you can open with 7zip or winrar. Once opened, grab the vexed native file and drop into your modules folder of Warband. Run, select vexed native 1.154 as usual and it works!

I followed it and it's worked for me =)

Dacarian's fix didn't work for me, I downloaded the mod from the mediafire link and put it in modules and I still get the "unable to find module info file." error. Any help?

Same for me :(

运行以后出错。

BROKEN