JSON error when submitting form

  • Resolved ScalarEnt

    (@scalarent)


    7 years, 4 months ago

    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

    (@takayukister)

    What other plugins and theme do you use?

    Thread Starter ScalarEnt

    (@scalarent)

    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

    (@takayukister)

    Try switching to the default theme and deactivating all the plugins except Contact Form 7, Really Simple CAPTCHA, and Yoast SEO.

    Thread Starter ScalarEnt

    (@scalarent)

    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

    (@scalarent)

    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

    (@scalarent)

    BTW – I found a newer version of the stability theme (3.0.6) and this exhibits exactly the same problem.

    hafman

    (@hafman)

    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)
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