I was trying to deploy a SharePoint App for the first time and ran into an error about SideLoading not being enabled on the site. The solution is fairly simple – you just have enable the Developer feature on the site.  Unfortunately, it’s a hidden feature so you have to do it through PowerShell.  While searching the internet for the command to enable the feature I kept running into really long scripts that seemed overly complicated.  Fortunately, Jeff (a friend at work) sent me this snippet that is very concise and does the job:

Enable-SPFeature e374875e-06b6-11e0-b0fa-57f5dfd72085 -url http://yoursharepointbox/site/

Obviously, you will need to update the URL to match your environment!