Developer site is used by a Visual Studio for deploying and developing the app. You do not need the app catalog site to deploy the solution on developer site because the developer site by default creates an app catalog. When you try to deploy add-in on non-developer site you got " Sideloading of apps is not enabled on this site " and to resolve this you need to enable app sideloading feature on the site. How to create developer site : 1. Login in your office 365 credentials and move to office 365 admin center and click on the SharePoint. 2. Now you are at SharePoint admin center by default you are at site collections section. Click on new – Private site collection . 3. Now fill the Title, Web Site Address and select the Develoepr Site in template section, selcet time zone and give the name of the Administrator of the site. You can also fill the resource quota, if you want and click on the OK. 4. You can check y...
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