Problem:

I was able to add custom fields in checkout page using WooCommerce Checkout Field Editor Pro plugin. But after adding around 15 fields I can't add more fields in the same section, it is saying "Your changes were not saved due to an error (or you made none!)." 


Solution: 

Seems it is an issue with the run-time configuration property max_input_vars value. Please try again after increasing its value. Below article may help you to increase max_input_vars value.


How to increase Max Input Vars?


In case you are not allowed to change the max_input_vars value, split the fields into separate sections instead of creating all fields in a single section. 


You can display newly created sections at below positions,



  • Before customer details  
  • After customer details  
  • Before billing form  
  • After billing form  
  • Before shipping form  
  • After shipping form  
  • Before registration form  
  • After registration form  
  • Before order_notes  
  • After order notes