I got such error message:
Error: Asset <kuid:276266:100021> is built-in.
Error: Asset <kuid:276266:1076> was not created by the local user.
Error: Asset <kuid2:111906:71001:1> is built-in.
Error: Asset <kuid2:276266:1075:1> was not created by the local user.
You have to use your own kuid and don´t try to load up the dependencies.
When the upload screen comes up in CM, untick the check box next the item and click then the accept button.