SSL support in YOURLS?

I recently added SSL certificates to my domain shortener. Accordingly, I updated define( ‘YOURLS_SITE’) in YOURLS’ config.php and “YOURLS Custom URL” in this plugin’s settings to use HTTPS instead of HTTP.

I can still create short URLs from YOURLS’ administrative dashboard, but attempts to do so from this plugin are met with “The API call returned a 403 response code.” On the plugin’s settings page, it states, “The YOURLS API is currently NOT accessible.” —?even though, when I click “Check Status”, it comes back with a checkmark.

How do I restore the ability to create short URLs from posts while retaining SSL support?

-Ken