@hawonjung can you please tell me where I need to go on these sites to produce the issue you’re seeing? All of these sites seem to be working just fine on my end using default site/Shields settings.
@hawonjung I tested all of the ones you linked and it has no issues. It would be good to know what problem you’re experiencing as you gave no description of a problem.
This is basically asking if you have made any changes to Shields settings. If so, if undoing them results in any difference.
Also questions that probably should be on their template: