WP Shift8 Plugin Error Detected : Unknown

I get the above message when I click the yellow Check button.
The URL Test is working.
The WordPress version is 5.7.2, there is no message in the root WP errow_log.
The Query Monitor shows a notice:
Message: Undefined index: path
Location: wp-content/plugins/shift8-cdn/shift8-cdn.php:143
What do I miss to make the service running?

This commonly happens when the site url doesnt match what you registered. Its very sensitive so it will give that error if you registered in our dashboard with


But in the plugin settings you put it as


Note the trailing slash. Please have a look and compare to make sure they match (as well the prefix and api key). If its still problematic after verifying maybe post a screenshot here?


Thanks, Kevin.
Problem solved.