This may be a dumb question but is the "not ready" written into the tune? or can you trick the system with resistors? I'm not well versed in the CARB requirements but if its a function of the EVAP system working as designed, you can temporarily put a resistor in your fuel level signal and make the the computer read it as full. IIRC the computer does not continuously monitor the EVAP performance, rather it sends a test out at a couple fuel level targets. I have a fuel cell, deleted evap system, and a ripp supercharger and I have no CEL.
Obviously not ideal as you paid for a product that is marketed to have no issues passing your states regulations. Just may be something to think about to maybe get it to pass. Disclaimer: I do not not know the legal ramifications of doing this so do so at your own risk.
I live in FL and I don't even know how emissions testing goes. You just need brake lights, headlights, turn signals and a license plate to be "street legal" and not messed with down here..