Hi John,
When you're having issues, you could try opening Chrome Developer Tools and recording the network activity. This might point us in the direction of whatever file or part of the site is having trouble loading. You could even export the .har file and post here for us to look at.
Here are some generic instructions for doing it:
https://confluence.atlassian.com/kb/generating-har-files-and-analyzing-web-requests-720420612.html