Switching site from http to https not getting results

General questions
1

I switched my store to a secure URL using https but now none of my results are showing up now

I just added the htpps version of the URL under the sites list. Will that fix it?

Piwik is loaded on a different site…had no problems the last 4 years until I switched the site I am tracking to https.

2

you need to also enable HTTPS on Piwik server and have valid certificate there