Error while trying to export to .fbx

Hello guys Been learning blender these past days, and upgraded my box character today and also did some new animations. When i wanted to export it so i could get it into unity like my other char, i went down as i normaly would and picked .fbx but got errors for the first time ever. i have been trying to fix whatever is wrong for like 1-2 hours now,trying different things and i just dont know what to do anymore. would hate to start all over. can anyone figure out whats wrong with it,or tell what the error means? :S

I think the error lies in the animations or something. cause did a export before i did some more animations and it worked.

Thanks in advance

ps: diddent know if i should put this in technical support or animation. sorry mods please forgive :slight_smile: