WebGL - ArgumentNullException: Parameter name: c/s

Hello everybody and thanks for your time, I am porting a really big project to WebGL and I was able to solve every problem I encountered until now. I get 2 errors on the development console (and the debugging screen of the browser, F12) when launching the app in WebGL (Chrome):
- ArgumentNullException: Argument cannot be null. Parameter name: s
- ArgumentNullException: Argument cannot be null. Parameter name: c

My problem is I don't know what those "s" and "c" parameters are, nor I know of a way of truly debugging where I am getting the Null... :s

Any help or advice to point me in the good direction will be appreciated!

 

No one has any tip? Any clue?

 

If you do a development build you should also see a more helpful callstack printed in the browser console.