To fix the ERROR_A0C you need to update your SketchUcationTools and reset your licensing cache.
Update the SketchUcationTools:https://sketchucation.com/resources/plugin-store-download
You can refer to the following instructions for installing plugins, in case you need help:
https://antonsynytsia.github.io/manuals/ClothWorks/installation.pdf Reset your cache by following the steps in ClothWorks licensing manual, Known Issue section, #3 if using Mac OS X or #4 if using Windows: https://antonsynytsia.github.io/manuals/ClothWorks/license.pdf
Thanks,
Anton