I am using the Service links module in my Drupal 7 site.
When using the Facebook "like" widget, I get the word "error" (in red color), in the place where the Facebook "Like" button should be.
When clicking on the word "Error", a Facebook popup window is opened with the error like so:
The href URL must be absolute
Note: I am using the Service links widgets inside a view. Other Services links widgets are working great, such as the Facebook share widget, Twitter, Google+ and Pinterest widgets.
What is the problem of the Facebook "like" button?