You may find that your provider (sic) also set the SSL and a redirect to either www or non-www and you are trying to reach the admin.
If you were using www.mySite.com/myAdmin to get to the admin, try accessing it with mySite.com/myAdmin.
If you were using mySite.com/myAdmin to get to the admin, try accessing it with www.mySite.com/myAdmin.
If the smoke clears, you need to make sure that the SSL points to one URL. Pointing to both www and non-www can lead to duplication punishment.
Once the SSL covers one (we prefer non-www), then the configure.php files should mirror the www status. AND, any redirects should point to the correct www status.
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