Add apps through classic SharePoint

If site owners encounter an error denying access to add an app to their site, they can switch to classic SharePoint to create the apps.

Go to the site and select the gear icon (top right corner) > Site contents.
Select Return to classic SharePoint (bottom left corner) > + add an app.
Search and click on the app icon you want to add.
Enter a Name and select Create.

You'll be directed back to the Site contents where the new app is listed.

To return to the modern SharePoint look, select Exit classic experience (bottom left corner) or close the tab.