The following errors may appear in Solr and Sitecore logs when using Solr as a content search provider and navigating through content items using the Content Editor:
ERROR SolrCore org.apache.solr.common.SolrException: org.apache.solr.search.SyntaxError: Cannot parse '(((__smallupdateddate_tdt:[0001-01-01T00:00:00Z TO *] AND __smallupdateddate_tdt:[* TO 9999-12-31T23:59:59Z}) AND __is_running_b:(True)) AND datasourceitems_t:(*{118AF7C6-E931-4182-87A4-550378A57ECF}*))': Encountered " "}" "} "" at line 1, column 198.
These errors are caused by issues with providing notifications related to the Content Testing functionality, and do not affect other Content Editor functions.
To address the issue, apply the following patch: