We are looking into a issue on our end. While we investigate this can you please hard reload your doc - that should help you get past this -
How to hard reload - Clear the cache of your Chrome browser using this simple method
Whilst keyboard options exist (e.g. Ctrl+Shift+R) you can access 2 reload options via the following method:
- Right-Click on the browser Reload Button
- Use F12 to open the Chrome Dev Tools.
Sorry about this and do drop us a note so we know you hit this issue.