Fluidbox is not working on Liebling theme


I had integrated Fluidbox as image gallery for a nice display to users in my previous theme (Casper), but it doesn’t work with Liebling theme.
I tried several things to make it works but without success for the moment.

Code is following and is in Code Injection, Site footer :

<script async src="https://cdn.jsdelivr.net/gh/Torqu3Wr3nch/fluidbox-ghost-blog-plugin@0.1.1a/fluidbox-ghost-blog-plugin.min.js"></script>
    window.fluidboxGhostConfig = {
      theme: 'light', // Options: light, dark, image-backdrop, hsla(262, 100%, 82%, 0.6)
      showCaption: true, // Sets whether to capture the caption and show it below the image when expanded

If someone has an idea to help me reproduce in my new theme, it should be great.