Thanks for your help (as always - dont know what I'd do without it!)
I have checked the json files using the validator and all is OK here (thanks for the link btw - very useful).
I have built the course and run locally using grunt server-scorm and all works fine - all images and resources are visible so all the links are fine too.
I have uploaded all files and folders (even the scorm files - although I know they are not necessary) onto my web server and tried to open index.html - still I get the 'loading' animation.
I have run the F12 developer tools and there are no errors and the page source has all loaded ok too.
I am really at a loss as to what I might be doing wrong here as like I said, it runs great on the localhost.
Any further guidance would be greatly appreciated. Has anyone else deployed a course without SCORM?
Thanks in advance,
Julie