Fatal error: Uncaught Error: Call to undefined function add_action() in /home/imperfettolab/public_html/web/app/plugins/post-smtp/Postman/Extensions/MainWP-Child/includes/rest-api/v1/class-psmwp-rest-api.php:15
Stack trace:
#0 /home/imperfettolab/public_html/web/app/plugins/post-smtp/Postman/Extensions/MainWP-Child/includes/rest-api/v1/class-psmwp-rest-api.php(127): PSMWP_Rest_API->__construct()
#1 {main}
thrown in /home/imperfettolab/public_html/web/app/plugins/post-smtp/Postman/Extensions/MainWP-Child/includes/rest-api/v1/class-psmwp-rest-api.php on line 15