In this article, I will be fixing this issue
Adding Data View is grayed out in SharePoint Designer 2013.
In SharePoint Designer 2013, I tried to add DataView in a web part page but unfortunately, the Data View is grayed out as shown below:
When I have been created a new workflow via SharePoint Designer 2013, I clicked publish, I got the following error:
"Errors were found when compiling the workflow. The workflow files were saved but cannot be run."
App Management Shared Service Proxy is not installed.
at Microsoft.SharePoint.AppRegistration.GetProxy(SPServiceContext serviceContext)
Cause: Continue reading Errors were found when compiling the workflow. The workflow files were saved but cannot be run