I must have spent 20+ hours on Google trying to get this fixed

the final solution came from a webpage that no longer exists.
google has it cached here:
https://webcache.googleusercontent.com/search?q=cache:72aA8GAd-ZsJ:www.codeleakers.com/archive/index.php/t-46326.html &cd=1&hl=en&ct=clnk&gl=us

This guide is for the WiiU, the wii will have the same process, but You will need a different ciso installer for the original wii.

Here is the ciso installation process:
https://gbatemp.net/threads/simple-guide-to-install-cios-on-vwii-backup-nand-and-keys.339890/

(work up to step 7) (if using a standard wii, substitute 'v10-beta52' with your standard non-alt cios)

after that we'll do the following:

8.) Select cIOS : <d2x-v10-beta52 d2x-v10-beta52-vWii>
Select cIOS base : <56>
Select cIOS slot : <249>

9.) Press A to install and wait for installation to finish.

10.) Press A to continue.

11.) Select cIOS : <d2x-v10-beta52 d2x-v10-beta52-vWii>
Select cIOS base : <57>
Select cIOS slot : <250>

12.) Press A to install and wait for installation to finish.

13.) Press A to continue.

14.) Select cIOS : <d2x-v10-beta53-alt-vWii> (Alternative: beta52)
Select cIOS base : <58>
Select cIOS slot : <251>

15.) Press A to install and wait for installation to finish.

16.) Press B to Exit.

now go back to your loader, and load your game!


if that still dose not work (for some reason)
just flash it again, but this time for slot 249 use 57, and for slot 250 use 56.

 

[Youpla]

Made an account on this forum just to say thx to BOBdotEXE for submitting this workaround years ago.

After spending hours trying to make CFG USB Loader work with my SDHC card, I ended up trying your solution and it worked.

Just started d2x installer again and used beta52 instead of beta53 for cIOS 249 base 56 and cIOS 250 base 57.

I'm just wondering if I'd better switch to beta52 for cIOS 251 base 58 also.

 

[godreborn]

Made an account on this forum just to say thx to BOBdotEXE for submitting this workaround years ago.

After spending hours trying to make CFG USB Loader work with my SDHC card, I ended up trying your solution and it worked.

Just started d2x installer again and used beta52 instead of beta53 for cIOS 249 base 56 and cIOS 250 base 57.

I'm just wondering if I'd better switch to beta52 for cIOS 251 base 58 also.

it's recommended that you don't mismatch d2x versions, so keep beta52 for cios 251.

 

[Daniel136]

Thanks finally can play Wii games on cfg usb loader