"AVG Has Blocked Access..."

Been checking for it for the past few days, and no popup.  Seems to have fixed itself.  Thanks!

Hello, as of today, I have started getting this popup that says "AVG has blocked access to ___ because the server certificate has been revoked."  So far, it's only been popping up on Tumblr.

It looks like this.  The popup is in the bottom right: Imgur: The magic of the Internet

1) What does this popup mean (in layman's terms)?

2) Is there a way to stop this particular popup from coming up without affecting what it does/is alerting to?  I don't want to stop AVG from doing what it's doing there, I just don't want to have to interrupt browsing to close the popup.

Hello Anna,

Thank you for your patience.

It's just a warning that the content loaded from mentioned source used expired certificate for HTTPS. I've tried one of the pages today and nothing was detected. Can you please check it once again and update me the status?

Hello Anna,

I understand the inconvenience.
It would be better, if you attach the image here.
Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.

Hello Anna,

Thank you for your patience.

It's just a warning that the content loaded from mentioned source used expired certificate for HTTPS. I've tried one of the pages today and nothing was detected. Can you please check it once again and update me the status?

Here is the second image.  It contains another URL, so I thought it would be good for additional info.  Unfortunately, I cannot seem to attach it to the reply itself, as it is apparently over 1MB Imgur: The magic of the Internet

Hello Anna,

I understand the inconvenience.
It would be better, if you attach the image here.
Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.