Facebook has changed its Settings and disabled the right click option to copy a link before you post it. Here is the workaround for this problem!
Unfortunately you will have to follow these steps each time you share a link in a group or on a wall.
Right click as you normally would on the Blue words. Then left click on “inspect element”.
Remove the ”un” from "unclickable" and it will become “clickable”.
Now the word says "clickable". Click the small "x" to exit inspect element.
Now you are ready to right click and copy the reward or request into the group
Unfortunately, you will have to do this each time you want to copy and paste a link into a group or onto your wall.