Check your dlclist.xml file in mods folder located in mods\update\update.rpf\common\data) , You can check for errors by opening and then saving, if there is an error it will tell you and then you can check each line for accuracy. In my case the dlclist in the mods folder wasn't updated, so I grabbed the original located outside the mods folders in the update folder and then replaced the dlclist file in mods folder and added my addons again and checking each line and it worked.