We are currently using 0.41.7 release. Many times metabase search is giving an "Error normalizing query" error and the system does not render results.
I strongly suggest you upgrade to the latest version, it should reduce the numbers of errors you're seeing, but moreso, it includes all the security fixes. You're running a very old version of Metabase with many security bugs
Our Organization has several Pulse and business teams that are taking time but in the next 2-3 weeks we will upgrade it to the latest release.