there's no new cIOS update for years. except maybe the mod to work with stealth hdd.
don't do random things with random files found on internet ! be sure you use correct version for correct console. learn how things work and what you need first, instead of randomly editing your setup and hoping it'll do something : yes, it'll do a brick !
to check which cIOS version/base you have, you need to run syscheck.
look in my signature, there's a guide. if you want you can post the result here and we will guide you if you need to do any modification.
If USBLoaderGX doesn't work, it's not due to cIOS but to setting or HDD. WiiU and newer HDD are bad mix, you need to change some settings in the loader : set loader's IOS to 58 instead of 249.
then change the game's IOS to the slot number where you installed base 57 (you'll know after doing syscheck).
edit:
I found your other thread here :
https://gbatemp.net/threads/vwii-usb-loader-gx-stuck-on-initialize-usb-device-screen.526605/
your problem : you UPDATED the cIOS !
yeah, because newer is NOT better.
the latest version of cIOS is beta, not working ! don't use r53 (it's explained in the guide to only install r52).
so, to fix your problem you don't need updated cIOS, you need outdated ones.
Also, your real issue is probably the Dock itself.
dock are acting like hubs, they are not compatible with cIOS.