I think there's an issue with opload and a problem with vrcfury, from what I've seen. Also, when I tried to opload, it gave me an error even though I had already configured the files. So, thanks for reading my message.

things you need.

VRCFURY.
POIYOMI

Remove the SPS in the armature, thats what got it to work

i never could get it to work but thats ok. Nice avi though.

is anyone having an issues with the blendshape of the boxers for all the pants and then the belt not toggling off?

could someone please help me upload him

I uploaded it just fine without any issues its not that its too big you need to remove the sps in the settings and it should work

Pretty much it's only two problams you gonna fix to used this avis
1/ need Lower Your Avatar's Texture Size (cause is way too big)
2/ make a int toggles for the pants off (cause they don't have it in the avis)
remember to removed the NSFW toggles in the menu of the avavat cause is broke
the Unity will make a new one for you when you uploaded it

its way to big to upload :sob