Hi after a migration on Drupal 7.69 / CiviCRM 5.33.2 everything went fine except that now we can't perform a simple search https://domain.net/civicrm/contact/search?reset=1 when there should be contacts.

If there is no contact (i.e searching inside a specific tag that is empty), it quickly returns the right information saying 'no results'. But if there are some contact (in type, group or tag), it keeps searching and after a while comes to an internal error (500).

The quick search top-left works fine but the advanced search also fails.

We guess that CiviCRM tries to write the search query in the civicrm_cache table in the database but fails, maybe this hypothesis is not relevant.

How could we improve this point? Any advice?

  • If it's error 500 then check the web server log (e.g. apache/nginx) - it will say the error.
    – Demerit
    Mar 2, 2021 at 14:16
  • this one is on a shared server so unfortunately I can't access server log :-( Mar 3, 2021 at 9:05

1 Answer 1


I had the same issue. After updating to 5.34.0, this issue was fixed for me.

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