Does not work for me out of the box with Mautic 5.1

[yocody]

So I forked the repo and made some adjustments regarding to Symfony’s autowiring and autoconfigure for services.
Find the forked repository here.

I shamelessly used the adjusted code base to create a plugin to load custom block definitions for Mautics GrapesJs builder from a theme folder, in case anyone is interested you will find the repo here.