Title: JSON error when submitting form
Last modified: June 30, 2017

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# JSON error when submitting form

 *  Resolved [ScalarEnt](https://wordpress.org/support/users/scalarent/)
 * (@scalarent)
 * [8 years, 11 months ago](https://wordpress.org/support/topic/json-error-when-submitting-form/)
 * When submitting any form from the website, it now just displays a JSON error 
   below the button and nothing is sent.
 * Error message is different in different browsers:
 * Chrome 59.0.3071.115 – “Unexpected token < in JSON at position 0”
 * FF 54.0.1 – “JSON.parse: unexpected character at line 1 column 1 of the JSON 
   data”
 * IE 11 – “Invalid character”
 * Forms were working fine until now. No updates or changes done on website recently.
   
   Problem seen initially in WP 4.7.5 – installed 4.8 but same problem.
 * Deleted and re-installed plugin (Ver 4.8) but no different.
 * Any ideas ?

Viewing 7 replies - 1 through 7 (of 7 total)

 *  Plugin Author [Takayuki Miyoshi](https://wordpress.org/support/users/takayukister/)
 * (@takayukister)
 * [8 years, 11 months ago](https://wordpress.org/support/topic/json-error-when-submitting-form/#post-9279132)
 * What other plugins and theme do you use?
 *  Thread Starter [ScalarEnt](https://wordpress.org/support/users/scalarent/)
 * (@scalarent)
 * [8 years, 11 months ago](https://wordpress.org/support/topic/json-error-when-submitting-form/#post-9283147)
 * Hi Takayuki,
 * Thanks for your email. Details below:
 * WordPress Plugins
    Akismet Anti-Spam – Version 3.3.2 Inactive bbPress – Version
   2.5.12 Inactive Breadcrumb NavXT – Version 5.7.0 Active Broken Link Checker –
   Version 1.11.3 Inactive Contact Form 7 – Version 4.8 Active Envato WordPress 
   Toolkit – Version 1.7.3 Active Google Analytics for WordPress by MonsterInsights–
   Version 6.2.0 Active HTML Page Sitemap – Version 1.3 Active Jetpack by WordPress.
   com – Version 5.0 Inactive LayerSlider WP – Version 5.1.1 Active P3 (Plugin Performance
   Profiler) – Version 1.5.3.9 Active Really Simple CAPTCHA – Version 2.0 Active
   Revolution Slider – Version 4.6.3 Active Shareaholic | share buttons, analytics,
   related content – Version 7.10.1.0 Active Shortcodes Ultimate – Version 4.10.1
   Active Social Icon Widget – Version 1.0.1 Active The Events Calendar – Version
   4.5.7 Active UpdraftPlus – Backup/Restore – Version 1.13.4 Active Wordfence Security–
   Version 6.3.12 Active WP-Cron Control – Version 0.7.1 Inactive WP Crontrol – 
   Version 1.5 Inactive Yoast SEO – Version 4.9 Active
 * Theme: Child theme based on Stability Version 1.0.0
 * Thanks
    Steve
 *  Plugin Author [Takayuki Miyoshi](https://wordpress.org/support/users/takayukister/)
 * (@takayukister)
 * [8 years, 11 months ago](https://wordpress.org/support/topic/json-error-when-submitting-form/#post-9286171)
 * Try switching to the default theme and deactivating all the plugins except Contact
   Form 7, Really Simple CAPTCHA, and Yoast SEO.
 *  Thread Starter [ScalarEnt](https://wordpress.org/support/users/scalarent/)
 * (@scalarent)
 * [8 years, 11 months ago](https://wordpress.org/support/topic/json-error-when-submitting-form/#post-9289971)
 * Hi Takayuki,
 * I have done as you suggested and the problem appears to be with the Stability
   theme. I have checked and there do not appear to be any newer versions.
 * Steve
 *  Thread Starter [ScalarEnt](https://wordpress.org/support/users/scalarent/)
 * (@scalarent)
 * [8 years, 11 months ago](https://wordpress.org/support/topic/json-error-when-submitting-form/#post-9291042)
 * Hi Takayuki,
 * This issue is not resolved. The theme has not been changed but this problem just
   started occurring recently.
 * Does your plugin use JSON that might give the error ?
 * FF 54.0.1 – “JSON.parse: unexpected character at line 1 column 1 of the JSON 
   data”
 * Is there any way of tracing where the problem lies ?
 *  Thread Starter [ScalarEnt](https://wordpress.org/support/users/scalarent/)
 * (@scalarent)
 * [8 years, 11 months ago](https://wordpress.org/support/topic/json-error-when-submitting-form/#post-9291051)
 * BTW – I found a newer version of the stability theme (3.0.6) and this exhibits
   exactly the same problem.
 *  [hafman](https://wordpress.org/support/users/hafman/)
 * (@hafman)
 * [8 years, 6 months ago](https://wordpress.org/support/topic/json-error-when-submitting-form/#post-9693398)
 * How is this resolved? No answers apart from the basic ‘turn off your plugins 
   one by one’
 * Having spent many wasted hours on the same issue i eventually narrowed it down
   to hosting. Ask them about mod_rewrite at the server level and explain your problem.
   
   I made a test site on a server that i know doesn’t balk at CF7 with the exact
   same setup and it ‘just worked’.

Viewing 7 replies - 1 through 7 (of 7 total)

The topic ‘JSON error when submitting form’ is closed to new replies.

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## Tags

 * [json](https://wordpress.org/support/topic-tag/json/)
 * [spinning icon](https://wordpress.org/support/topic-tag/spinning-icon/)

 * 7 replies
 * 3 participants
 * Last reply from: [hafman](https://wordpress.org/support/users/hafman/)
 * Last activity: [8 years, 6 months ago](https://wordpress.org/support/topic/json-error-when-submitting-form/#post-9693398)
 * Status: resolved