The problem happens day or night on certain checklists.
This list, for example, is not able to be opened at any time for the last two days, it shows the title and then just hangs. This list is public, so you can see what I am saying, even though the forum says it requires login, it does not. But in regards to the actual list, it is not loading on any device on our end.
To access the list using the URL you posted above, the list should be made indexable by search engines (can be set in the sharing options of the list).
Have you tried clearing browser caches to open the list? Which browser do you use?