In your WordPress recently, you might chance upon the Facebook Like Button suddenly displaying a red "error" instead of showing you the count for Likes, and when you click on the red error, you are directed to a Facebook page with the following shown: "The href URL must be absolute".
While we’re not sure what is the cause behind this, after a few trial-and-errors (because we can’t help ourselves), we found the culprit to be the
Look at your theme’s codes, where the error occurs and find:
Replace it with the following:
And the error would have been rectified in no time.