nexromant none of those errors are related with this extension and missing icons seems like a Font Awesome issue. As you can see from here, I'm using Font Awesome 5 Free font for those icons.
nexromant Please tell me, Your extension has a function for scrolling through slides?
Yes, it has this functionality. But somehow your images are not responding any clicks and honestly I've no idea what might be causing the issue since there are no errors on the console at all. My best guest will be a confliction with another extension installed on your Flarum setup.
