OK, I tried to sum up things with Propel ORM, a ‘fast blazing’ experience, however idiotically it didn’t work somehow — composer require propel/propel; composer remove propel/propela thing worth mentioning, not only did it consume time & energy, it wasted the whole plausible playtime on a machine in general.

Firstly, a yaml configuration file is not recognized although a schema is generated more or less correctly reversed database section scope.

Not an amazing experience with Propel ORM

So, I’d suggest debugging deeply — maybe using annotations to help it out Doctrine ORM project well, because it may be the only cause for correct JSON response generator in the whole PHP industry.