Contact Form 7 are not working
If your Contact Form 7 form doesn’t work, you need to add a namespace exception for REST API on the Hardening tab. Enter contact-form-7 in the Allow these namespaces setting field as shown on the screenshot below.
Allow using Contact Form 7 if access to WordPress REST API is disabled
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I'm a team lead in Cerber Tech. I'm a software & database architect, WordPress - PHP - SQL - JavaScript developer. I started coding in 1993 on IBM System/370 (yeah, that was amazing days) and today software engineering at Cerber Tech is how I make my living. I've taught to have high standards for myself as well as using them in developing software solutions.