Car does not accelerate when pushing on the gas pedal

What is your question?

Happens intermittently, especially after in city driving with starts and stops. Literally have to floor it for it to finally go. Had check engine light checked and says transmission assembly. Not sure what that involves ?

What makes this problem better or worse?

Worse when in city driving

How long has your 2017 Nissan Altima had this problem?

Started few months ago