StoragePoint Added support SharePoint 2019 in version 5.9 With support for modern UI in 5.9.1.
SharePoint 2019 introduced a new look and feel for the user interface. StoragePoint links will work on this new user interface, but some additional configuration is necessary.
A Site Collection Feature will be deployed to SharePoint 2019 farms as of the 5.9.1 release. This feature should be enabled on the site collection for full StoragePoint user interface functionality.
Before activating the Site Collection Feature, an App Catalog must be configured for the web application, as well as an App Management service application.