I have never been able to get OSC to work for me, I have tried multiple different programs and nothing seems to work. I am able to get all of them to send input that I can see in the debug menu but nothing ever happens in game. For instance, I try using the program to type something into my chat box and it never shows up but I get input in the debug menu for chat box typing and sending messages. I have chat boxes shown as I can see them when I use the keyboard in game. I have tried everything.
If anyone ever has this issue, try reinstalling vrchat onto a different ssd/hdd. I had vrchat saved onto 2 ssds that were merged/partioned together as 1 disk option and I had to move vrchat to my single ssd that isnt merged and it works.