@limitlessmotors01,
Did you clear all cached files? Steps provided below may help.
(1) If you have another cache plugin, refresh the cache for that plugin.
(2) If you’re using a CDN (e.g., Cloudflare), clear its cache.
(3) Clear your local (i.e., browser) cache by performing the following keyboard command: Ctrl + F5
(4) Refresh your WP Dashboard.
(5) Check SG Optimizer again.
Cheers!
The plugin interface works through the WordPress Rest API. If you have a security plugin or .htaccess rules stopping the API from working, then you won’t be able to use the SG Optimizer plugin.