I have trouble in with the creation kit uploading my mod's .esp file to steam, I already have uploaded another file successfully but the ck seems to have a problem with my new file. I keep getting some HAVOK errors:

list shape with child container subshape found in nif will not be able to resolve support material for character controller collisions properly

Archive process railed

Runtime Error

Program SkyrimArchiveextern

This application has requested the Runtime to terminate it in an unusual way

Archive creation tool does not work anymore....

I couldn't find any working solution or even someone with the same issues, so I'm asking you. Whats wrong? My mod runs ingame as it should, and when loading it in the ck I only get the localization error because my game is in another language.