Abilify and Cannabis - Cannot get high off Cannabis any longer due to Abilify

[Truthometer]

I have been taking 400mg of Abilify per month for 8 months now, and 3-4 months into the treatment I have noticed that THC no longer gives me euphoria ("high"). I know THC works to produce its euphoric effects partly by indirectly stimulating the mesolimbic pathway; and Abilify reduces activity here.

How else can one explain this phenomenon?
Has anyone else experiened the same?
Why doesn't Cannabis get me high any longer?
What are the possible remedies for such a condition?
How long after I quit taking Abilify can I expect to gain my ability to experience pleasure from Cannabis again?