@Riposte: Thanks for writing back.
>So, theoretically I should be on the correct and latest version of cwsoft-foldergallery?
Have not tried to install cwsoft-foldergallery with Composer for SS 3.1.1 recently, so I can't comment on that. But yes, in principal it should work. To be sure, you could [url=https://github.com/cwsoft/silverstripe-cwsoft-foldergallery/archive/master.zip]directly download[/url] from the master branch and install this version.
>Unfortunately the problem still exists unless script.js is included at the bottom
The only thing in script.js I can think of affecting the cwsoft-gallery is the first line:
Could you please try the following:
just add // at the beginning of this line --> this should break the Slideshow etc.
--> does this restore the functionallity ?
c) if b) works, remove the comments made in step a) and check if things still work
d) if non of the above work, I would need to have a look at your template to check whats going wrong
--> would you mind sending me your template via Email (see GitHub account for details) ?
Anyway, thanks for your patience.