Unexpected token < in JSON at position 0 - Contact Form 7

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#1

The forms send the message but throw an error:

Unexpected token <in JSON at position 0

In addition, the mandatory field alerts stopped working

#2

Hi @elkuan,

I recommend the following troubleshooting procedures.

  1. TESTING FOR THEME RELATED ISSUE
  2. TESTING FOR PLUGIN CONFLICT
  3. THEME UPDATE
  4. CHILD THEME
  5. CSS/JS CUSTOMIZATION
  6. VERSION COMPATIBILITY

Let us know how it goes.

Thank you.

#3

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