Which issue are you referring to? The usual suspects for problems with CVPCB are:
- Setup of your schematic libraries, and the footprint libraries.
- Access to the libraries hosted on Github
- Missing, incomplete or out-of-date local libraries
These have been discussed in multiple threads.
I am quite pleased if you found my SOT-223 footprint either helpful (as a teaching example) or useful (in a layout).
p.s. - The KiCAD library system is NOT easy to understand. Don't be afraid to ask questions if you are baffled after making an honest try to understand it.