Note: The Sandbox Solution Server extension has been deprecated, and is no longer required for migration. This article will explain how to deactivate it.
- Navigate to the SharePoint site collection Site Settings.
- Depending on the version of SharePoint, locate the column Galleries or Web Designer Galleries, and select Solutions.
Tip: If you can't see the feature Solutions under Web Design Galleries, it is because custom scripts are not activated on the site collection level. For information on activating custom scripts, see the Microsoft article, Allow or prevent custom script.
- Select the current installation of the ShareGate Server Extension.
- Click Deactivate.
- Once deactivated, you can click Delete.
It is possible that in your case, the solution was already deactivated. If you cannot press Deactivate, that means it has already been deactivated. For example: