This is a completely free plugin that works perfectly fine with the default WordPress editors (both the classic and new block editor).
Unfortunately it’s just not possible to spend the time on making this plugin compatible with the numerous page builders out there as well. I am not getting paid for this.
So it might not work with your favorite page builder, but it’s a bit frustrating to get a 1-star review for that. I feel like that doesn’t reflect the functionality the plugin promises in any way.