Need help answering couple questions about Clinton email leak/hack.

1. Is it true that the official narrative states Hillary Clinton lost the election because of the emails leaked to wikileaks?

2..If that is true, what specifically in said emails caused such a problem in her campaign?

Im not interested who (no offense) you think leaked/hacked the emails. Nor Riches part. Nor left or right opinions. Just need answers to the 2 questions above. Thanks for the help in advance!