Title: Invalid JSON response error message
Last modified: October 22, 2025

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# Invalid JSON response error message

 *  [stv11c](https://wordpress.org/support/users/stv11c/)
 * (@stv11c)
 * [7 months, 1 week ago](https://wordpress.org/support/topic/invalid-json-response-error-message/)
 * Hi, I have recently noticed that submitting a CF7 form (with this plugin enabled)
   does not show the successfully sent message anymore and spinner keeps going. 
   The email does get delivered and sync with Hubspot.
 * Looking at the Browser Console, the following error appears after submitting 
   the form:
 * **_{code: ‘invalid\_json’, message: ‘The response is not a valid JSON response.’}_**
 * I narrowed the issue down to this plugin (1.4.1) after debugging the website 
   thoroughly. Currently running latest WP 6.8.3 on PHP 8.3.
 * I look forward to hearing from you. Regards,

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [CRM Perks Support](https://wordpress.org/support/users/crmperkshelp/)
 * (@crmperkshelp)
 * [7 months, 1 week ago](https://wordpress.org/support/topic/invalid-json-response-error-message/#post-18691245)
 * Thank You for reporting this issue , we have fixed it in 1.4.2
 *  Thread Starter [stv11c](https://wordpress.org/support/users/stv11c/)
 * (@stv11c)
 * [7 months, 1 week ago](https://wordpress.org/support/topic/invalid-json-response-error-message/#post-18691637)
 * Confirmed 1.4.2 has resolved this issue. Thanks for sorting it out so quick 🙂

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Invalid JSON response error message’ is closed to new replies.

 * ![](https://ps.w.org/cf7-hubspot/assets/icon-256x256.png?rev=2585265)
 * [Integration for HubSpot and Contact Form 7, WPForms, Elementor, Ninja Forms](https://wordpress.org/plugins/cf7-hubspot/)
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 * 2 replies
 * 2 participants
 * Last reply from: [stv11c](https://wordpress.org/support/users/stv11c/)
 * Last activity: [7 months, 1 week ago](https://wordpress.org/support/topic/invalid-json-response-error-message/#post-18691637)
 * Status: not resolved