You may have typed the template name wrong or "themissingpie

[jokernippe]

what shall I do to make it work when it is such a text?" You May Have typed the template name wrong or "themissingpiece 'does not exist." Click here to fix it.
Where should I go com to get it to work?

[chuckroast]

That error means you ignored the instructions where it said which template was compatible for your version of Pligg you are running. I can only suggest you reinstall Pligg, and this time take the few seconds it takes to read and comprehend the instructions.