The problem has already been solved! Thanks for getting back to me but I've fixed the problem. I reinstalled my plesk server that's what happened but support sent me a new API key so it's working fine now .
Thanks Again Bye
I am trying to use the SiteJet Builder extension on one of y sites in plesk and its asking for Sitejet API Key.
Can anyone help as to why this is happening, to my understanding its included with plesk. I did reinstall plesk on a new server.