To replicate, search all contacts, try to scroll to page 2 "Network Error Unable to reach the server. Please refresh this page in your browser and try again."

Reported by 2 clients, able to replicate. Workaround is to use the 'glossary' of first letter of display name. Pagination works fine after this. Reverting to 'All' also reverts the problem

Replicated on CiviCRM v 5.11.0 and 5.12.0 Wordpress 5.1.1 and Drupal 7 Ubuntu 16.04 PHP 7.1.24, Apache

Network Error

  • It seems to be ok on dmaster.demo.civicrm.org - can you check there and confirm?
    – Aidan
    Apr 12, 2019 at 8:51
  • Yes I should have mentioned that I checked the demo too and it is fine. But not on my clients's sites - replicated on 3 sites now, which have at least several thousand contacts.
    – MickC
    Apr 13, 2019 at 9:30
  • We are suffering from a similar problem and the common factor seems to be contact search. There is no response to "export contacts" action when all radio button is chosen after a search is done on contacts. It just wouldn't export. I noticed there is something funny about the quick search console. There appears to be an error being raised. See the error log in the screenshot.![See the error log in the screenshot](i.sstatic.net/FqXQU.png) May 16, 2019 at 17:11
  • did anyone find an answer to this one as we have it when doing a contact search on a group. Can hit first page and last but not the intermediate pages or change the sort size.
    – Des Quinn
    Jun 10, 2019 at 14:54

1 Answer 1


[SOLVED] Yes found an answer with the help of the CiviCRM team - see https://lab.civicrm.org/dev/core/issues/963

The issue is MySQL configuration after upgrading, which adds ONLY_FULL_GROUP_BY to variable sql-mode. There is a link to a patch but I found it straghtforward to remove this by adding the following line to my.cnf


Hope that helps.

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