If you enter embedding code directly into the body of a WordPress page or post, make sure that the method of entry is 'Text' (which respects HTML code) and not 'Visual' (otherwise you will just see the code that you enter on the screen instead of the gallery).
Also, if you use the embedding code you posted above, you would need to upload the contents of your gallery folder to the same directory as the HTML page which contains the embedding code. This might be difficult to determine in a WordPress environment and I would recommend using the baseUrl method as described here.
Essentially, once you have created a gallery with JuiceboxBuilder-Pro, you would upload the complete gallery folder (not just the contents) to your web server and paste the baseUrl embedding code into the body of your WordPress post (ensuring that the method of entry is 'Text' rather than 'Visual'). It does not matter where on your web server you upload your gallery folder to as long as the two paths in the embedding code (the path to the 'juicebox.js' file and the baseUrl itself, pointing towards the gallery folder) are correct.
Another problem i ran into; the shopping car is gone on the mobile version.
Shopping Cart functionality is disabled in Small Screen Mode as most mobile device screens are not large enough to accommodate the size of the Fotomoto pop-up window. This is noted in the 'Additional notes' section of the Shopping Cart support page.