I had the Same Problem, I was able to find a solution after reading the plugin’s documentation….
You have to go into the wp-config.php and manually set the API key there
Paste this at the very bottom of your wp-config.php file
define(‘SENDGRID_API_KEY’, ‘PUT-YOUR-API-KEY-HERE’);
-
This reply was modified 6 years, 9 months ago by tommy1691.