I saw that a similar topic exists, but changing the home page is not my case. I want to see a widget on just one particular page. I'm trying to do that with url of the post.
-I set all options to 'No'
-I checked "Make exception rule available to individual posts and tags"
-I checked "no" in url section
-in "Except the URLs" I pasted the url like that: http://mydomain.org/name-of-post/
-I hit "save"
And nothing happens. I tried changing "no" to "yes", putting * or / before the url, deleted http://.
What do I do wrong?