If you want, I can:
Repacks carry over old GXGlobal.cfg and wiitdb.xml files that can force incompatible USB modes. wii usb loader gx usb device not initialized repack
Note that the above examples are for illustrative purposes only and may not reflect the actual configuration files or USB device settings. If you want, I can: Repacks carry over old GXGlobal
Once you launch USB Loader GX (even with the error), you can still access settings before it switches to channel mode. If you want
Some repacks come with outdated or missing cIOS installer WADs. The repack might have assumed you already have installed in slots 249, 250, and 251.