You might see issues with the Grid Manager or Tenant Manager after upgrade.
The Grid Manager or Tenant Manager might not respond as expected after StorageGRID software is upgraded. For example, after you use the Grid Manager to acknowledge an alarm and click Apply Changes, the change might not be saved.
Clearing the cache removes outdated resources used by the previous version of StorageGRID software, and permits the user interface to operate correctly again. For instructions, see the documentation for your web browser.