- Visit your Office 365 SharePoint Admin Center
- In the left pane, under Admin centers, select SharePoint. (You might need to select Show all to see the list of admin centers.) If the classic SharePoint admin center appears, select Open it now at the top of the page to open the new SharePoint admin center.
- In the left pane, select Classic features
- Under Apps, select Open.
- Select App Catalog.
- If the App Catalog site doesn't open, select Create a new app catalog site, and then select OK.
Solution: Create an app catalog in your SharePoint Admin Center.
Updated on March 31, 2020