Preview and publish taking an age and then not working
I've created a simple drag and drop resource in Storyline. One intro slide, 4 separate scenes. Each slide is only one very low res image and the rest is simple text. Only about 50 slides in all. No audio or video.
The problem is, when I come to preview the whole project, it takes about 30 minutes and then doesn't work (no error message). Similarly, when I try and publish, it takes about 30 minutes but appears to work. However, when I try and view on our LMS, I simply get a blank page.
The native file size is around 18MB. The output published size is a little under 10MB.
Please can someone help?
Many thanks in advance,