Juicebox-Lite has a limit of 50 images per gallery. Juicebox-Pro does not have a limit to the number of images you can have in a gallery. It sounds like you have not updated the Drupal module to use your Juicebox-Pro files.

Follow the 'Installation' instructions here: https://www.drupal.org/node/2000300#installation
... and make sure that you use the 'jbcore' folder from the Juicebox-Pro download zip package.

If you continue to experience difficulties, please post back with the URL to your gallery's web page so that I can take a look at the problem and hopefully help further.

I am having the same image limit problem as mentioned in the earlier post.  I have juicebox installed on a Drupal 8.1 site.  I had the lite version but earlier today purchased the PRO version.  I uninstalled the Drupal module, then reinstalled it.  In configuration on Drupal I can see the settings for the PRO version so I am assuming it is working with the PRO version. 

In juiceboxbuilder on my PC I built a gallery with over a 100 pictures in it.  It runs fine on the PC.  I followed the uploading instructions and stuffed all the files in my /public_html/drupal8/jboxgalleries folder.  I used a subfolder under jboxgalleries for the first gallery with the thought that I might eventually have other galleries there.

I've double and triple checked all juicebox.js files.  There's one in sites/all /libraries/juicebox and another one in the uploaded gallery in a jbcore directory.  Viewing them all they say PRO version. 

http://www.fkelly.org/drupal8/node/19

will show you the gallery that is limited to 50.  There are 100 plus images in the images and thumbnail directory.  The config.xml file also lists the 100+ images. 

I've cleared cache a number of times.  I even had Drupal not cache the css and js files, thinking maybe these needed to be rebuilt.  Nothing.

Again, yes, it was the browser cache.  Drupal has it's own cache which also needs to be cleared in situations like these but it was browser cache in this case.

Working great.  and thanks for working on Christmas!   

Frank

The Pro features work within Drupal 8.  Yes.  Autoplay works and there is no 50 image per Gallery limit. 

However (and correct me if I'm wrong) the Juicebox module on Drupal 8 has minimal interaction with this.  Basically, Juicebox builder builds an image and a thumbnails directory and a file named config.xml which has your gallery settings and links to your image files.  The gallery presentation uses the juicebox.js file which gets installed on your Drupal site as part of the juicebox Drupal 8 module.

I used Drupal to create a separate "Juicebox Gallery" content type and used the embed code that's discussed on this site tailored for each separate Gallery, so creating individual Galleries was pretty much cookie cutter.  Also used Drupal's menu features to make the galleries accessible to site visitors.

One consideration ... ignore if you wish ... is that you might want to consider putting your images under your public files directory in Drupal.  That way you can re-use them in other content types and access them from CKEDITOR and IMCE when creating those content types. 

fkelly.org has my galleries.

Stuart;
Nice to meet you.  Yes, the bats were eerie, spectacular too.

I haven't used views for this at all and am not sure I can help.  I think your albums content type is the equivalent to what I am calling a Juicebox Gallery content type.  The only field I have in mine is a body field.  I paste the embed code into it like this example:

<!--START JUICEBOX EMBED--><script src="/drupal8/sites/all/libraries/juicebox/juicebox.js"></script><script>
    new juicebox({
        baseUrl : '/drupal8/sites/default/files/jboxgalleries/rainforest/',
        containerId: 'juicebox-container',
        galleryWidth: '100%',
        galleryHeight: '100%',
        backgroundColor: '#222222'
    });
    </script>
<div id="juicebox-container">&nbsp;</div>
<!--END JUICEBOX EMBED-->

So, I have a content item named Australia Rainforest that is of the content type Juicebox Gallery.  I set a url for that album of /rainforest so I don't have to mess around with accessing "node" numbers.  Maybe tomorrow I'll mess around with setting up a view to point to /rainforest and see what I can do.  When you say "lightbox" what are you referring to?  The initial image in a Juicebox Gallery or something from the lightbox module.  I'm not even sure lightbox works with Drupal 8, I had it installed under Drupal 7 but there's a whole bunch of stuff that doesn't work in 8 yet.

I'm a bit late to the party but, just in case it helps, in answer to stuartj's query:

... fkelly12054 seems to be manually embedding Juicebox galleries (which have already been configured with Pro options) into Drupal pages using the baseUrl method of embedding but if you are using the Juicebox module and the Pro 'jbcore' folder (in Step #3 of the 'Installation' instructions here), then Pro options (such as AutoPlay options) can be entered as text into the 'Juicebox Library - Pro / Manual Config' section of your Drupal Dashboard ('Home -> Administration -> Structure -> Content types -> Article -> Manage Display -> Juicebox settings').