MultiCharacter

Can I use my own multicharacter?

Yes, you can. To disable the built in multicharacter change this setting to true in qbx_core/config/client.lua

 -- Whether you have an external character management resource. (If true, disables the character management inside the core)
useExternalCharacters = false,

Stuck in loading screen?

Your multicharacter most likely never calls the loading screen to shutdown. You can fix this 2 ways:

1. Open your server.cfg and edit setr loadscreen:externalShutdown to be false
2. Edit your multicharacter resources to call the ShutdownLoadingScreen() and ShutdownLoadingScreenNui() natives. Like qbx_core does here