title: Prestashop Technical Error: Details: Error Thrown: [Object Object] Text Status: Parsererror
body: <p>I am getting this error when trying to add weight ranges to shipping carriers that I have. It mostly seems to happen at random and I have been able to complete some of the carriers but others will cause the error every  time.  The console reports the following: Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check <a href="https://xhr.spec.whatwg.org/" rel="nofollow">https://xhr.spec.whatwg.org/</a>.</p>
  
  <p>Is there a solution for this?  I couldn't find anything online about it.</p>
  
  <p>I have v. 1.6.1.4</p>
  
  <p>Thank you!</p>