Product Customization returns ContextErrorException Notice: Undefined index: product_availability

[JerseyCustomz]

Hello,

 

Recently upgraded to 1.7.8.7, couple of hiccups along the way and still sorting image quality/settings but that's not what's on the plate today.

I'm having an issue with any product that has customization turned on, when the Save Customization button is clicked and error screen is displayed. If you return to the cart the inputted data is saved and you can proceed with checkout. I have stock management disabled, but  added quantities to each product just to make sure that wasn't the issue. I did not have this issue with previous installation.

No errors when adding no customized items to the cart.

 

Any assistance would be appreciated.