So I finally figure out a way to solve this problem, I don't know which of the following settings solved it, but now I can launch BigBox from Steamlink and see BigBox running on my mobile:
On Steam, I disabled the following settings:
Shader Pre-Caching
[UNCHECKED] Enable Shader Pre-Caching
Controller
[CHECKED] Disable controller connected notifications in the desktop client
Remote Play
Advanced Host Options
Unchecked EVERYTHING (from Play audio on host to Enable hardware encoding on Intel iGPU)
Interface
Unchecked EVERYTHING from Scale text and icons to match monitor settings to Notify me about additions or changes to my games...,
EXCEPT Run Steam when my computer starts, this one I left CHECKED
In-Games
Unchecked
Enable the Steam Overlay while in-game
Use the Big Picture Overlay...
Use Desktop Game theatre...
Display a notification
Save an uncompressed copy
I'm pretty sure there are options that can be checked/unchecked but I didn't try them yet, just wanted to help those with the same problem I had, after you see BigBox working you can get back and check/uncheck each option one at a time to see which one was causing the blank screen problema.