This typically has 3 possible causes..
1. Droplets are either not installed, or uninstalled.
2. The droplet "ShowSection" does not exist in your website.
3. Some other PHP error (failure) stops php before droplets are executed.
the first one is unlikely..
the second can only be checked by yourself..
the third on can be checked by calling [[lorem]] or any other standard droplet. If this fails too, do the same checks on a different page.