As somebody who you’ve decided to have a go at, I will reply.
Take a look at the date of my posting, over a year ago. Back then there was a genuine bug with templates in FCP that could not be fixed by reinstalling or moving/repairing files.
Just in case you don’t believe an ‘expert’ here is the Apple knowledgebase article. Apple then published a fix in the next update. I stand by my post as it was accurate at the time. https://support.apple.com/kb/TA25041