thank @fraguada , yes I solved my issue printing to console the compute response and observing that the property name was “0” instead of " 0; ".
I downloaded the rhino compute version from here following the steps that @will showed in the Core Workshop in November.
Rhino App Server was also cloned using git, following github instructions
In fact, the response to heroku is " 0: " while my local rhinocompute is responding without white spaces nor semicolons (you can checks this in the txt. files I shared in a previous post, responding to @will)
Problem solved from my part, but yeah, apparently something has been changed in the last rhino.compute master.
thanks