Description

Search queries against Azure Search might fail with an error similar to the following:

Exception System.MissingMethodException: Constructor on type 'Sitecore.ContentSearch.Azure.Query.CloudSearchResults`1[[Sitecore.ContentSearch.SearchTypes.SearchResultItem, Sitecore.ContentSearch, Version=4.0.0.0, Culture=neutral, PublicKeyToken=null]]' not found.

For SXA sites, refer to the CloudSearchResults constructor not found error when using Azure Search provider with SXA.

Solution

To resolve the issue, consider one of the following options:

• Upgrade the Sitecore XP instance to 9.2 Initial Release or later (recommended).
• Download and install the following hotfix found on this page:
  

  For Sitecore XP 9.1.0, 9.1.1: SC Hotfix-328521-1 Sitecore.ContentSearch.Azure 4.0.0.zip

  Be aware that the hotfix was built for a specific Sitecore XP version, and must not be installed on other Sitecore XP versions or in combination with other hotfixes. In case any other hotfixes have already been installed on certain Sitecore XP instance, send a request for a compatibility check to Sitecore Support.

  Note that the ZIP file contents need to be extracted to locate installation instructions and related files inside. The hotfixes must be installed on a CM instance and then synced with other instances using standard development practices.