We've created 2 webparts under a single visual studio solution as a farm environment. But after creating the WSP and trying to deploy it to our UAT, we are getting the following error
This solution contains invalid markup or elements that cannot be deployed as part of a sandboxed solution. Solution manifest for solution '59bb837b-7774-4737-b81e-365335f9c665' failed validation, file manifest.xml, line 11, character 4: The element 'Solution' in namespace 'schemas.microsoft.com/sharepoint/' has invalid child element 'TemplateFiles' in namespace 'schemas.microsoft.com/sharepoint/'. List of possible elements expected: 'FeatureManifests, ActivationDependencies' in namespace 'schemas.microsoft.com/sharepoint/'. Troubleshoot issues with Microsoft SharePoint Foundation. Correlation ID: 9a610e27-f8a0-4054-b1b7-93d25321a4de
Do we need to check our manifest file against the schema or is there something we are overlooking?