I am trying to implement the JavaScript Shared Runtime for an Office.js Excel Add-in, but when I add the <Runtimes> element I get the following error:
The element 'Host' in namespace 'http://schemas.microsoft.com/office/taskpaneappversionoverrides' has invalid child element 'Runtimes' in namespace 'http://schemas.microsoft.com/office/taskpaneappversionoverrides'. List of possible elements expected: 'AllFormFactors, DesktopFormFactor' in namespace 'http://schemas.microsoft.com/office/taskpaneappversionoverrides'.