In the admin section of Magento, Customer edit & update the content and save the customer. It throws an error like:

A technical problem with the server created an error

. Try again to continue what you were doing. If the problem persists, try again later. using Magento 2.2.6, there is no error displayed in log files

  • hey did you check post parmas? are you sending it properly means is there any required param which you are not sending in post request? – Shubham Khandelwal Apr 24 '19 at 11:35
  • Now am able to resolve, since it is happening due to installing third party plugin – Anil Kumar Apr 24 '19 at 11:42

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