Do you submit HTTPS versions of your sites as separate sites in Google Search Console? So you have both http://example.com and https://example.com as web properties?
When I switched to https I couldn't submit the http version any longer. It would say "URL not in property".
Oh, wait. It was several years ago. I've just realized that this is my new account. I've never submitted my http version there. Oops. But I've found the answer. In the past you'd have to submit them separately, not anymore. Looks like you can just submit example.com and it should suffice. Update (February 27, 2019): Google have announced domain-wide data in Search Console, which combines all subdomains and protocols of a domain, http, https, www, and non-www. https://webmasters.stackexchange.co...g-from-http-to-https-in-google-search-console https://developers.google.com/search/blog/2019/02/announcing-domain-wide-data-in-search
If you have submitted the HTTP version to the webmaster and now you are having an SSL certificate enabled (HTTPS) to your website then you need to submit or switch the older HTTP version to the Search Console. If you submit HTTP and HTTPS separately then it will considered as two websites by the search console so you have to remove the one from there.