Since you’ve already changed the site domain, I’d try this:
Restart the site that you’re having this issue on
If the site is already selected in Local, click off of it onto another site and then back onto it. This will force some of the information on the site panel to refresh including the site’s certificate fingerprint that Local looks for in the system keychain.
Go to “SSL” tab and click “Trust”
Press Cmd + Shift + R in Chrome to do a hard refresh. This should force Chrome to look up the certificate in the keychain to see if it’s trusted.
I did all of the above and still have the error in Chrome that the SSL is not trusted. Everything was working fine until I went from .dev to .local. Using local version 2.2.4 and chrome 65.