Since the plug in knows exactly which link it considers as invalid it needs to mark the one that fails. Going through 50 links one by one when the plug in already know which it has problems with is got a good solution
And this is particularly irritating when you test all URLs and they all work, yet checklist flags as not valid, there needs to be an override button. At this point we have to disable the plugin in order to publish. Not a great solution
And then there is the problem of blocking valid URL as invalid
Can you inform us what URL is that? We will try to replicate it from our end.
For the red notice, can you please try basic troubleshooting like deactivate all plugins except PublishPress Checklists to see if the red notice showing? I could see the notice just fine here.
We haven’t heard back from you in two weeks. Let me mark this as resolved. You do not need to worry about it. You can always reply to this message or create a new one if you would like to continue the discussion.