I tried to implement the Click Here to Register Button in the designated article but it is not visible. Is there some tag I need to insert in the article to get this button to appear? I turned on the module for this to appear.
For this to appear automatically in an article you need:
1) EventLink plugin installed AND enabled
2) Article selected as the details article in the event setup.
To manually add a register button in any article, use the plugin code as instructed in the sticky post about it. Also, you must of course have the EventLink plugin installed and enabled.
If you do have these items in place and have the article selected for the event... but still no button... then most likely you have selected the same article for multiple events AND you do not have the latest version of the plugin. The latest version will allow multiple events sharing the same article, although that is still not recommended.