WordPress fix Error: The response is not a valid JSON response.

As a WordPress developer, I can fix the WordPress issue: “updating failed.  The response is not a valid JSON response.”.

Possible reasons:

• 1. Issue of WP REST API, you can disable the wp rest API.
• 2. WordPress gutenberg editor issue, you can disable the WordPress,

add_filter(‘use_block_editor_for_post’, ‘__return_false’);
remove_action( ‘wp_enqueue_scripts’, ‘wp_common_block_scripts_and_styles’ );

3.Caused by shortcode

4. Caused by elementor

The above are possible meaning of  “The response is not a valid JSON response”.

If you are busy, I can help you fix this WordPress problem.