I was able to add a custom domain to a Azure deployment slot on one web app, but when I tried to add one to another, I keep getting:
The resource 'Microsoft.Web/sites/xxx(xxxx)' under resource group 'Default-Web-WestEurope' was not found
*Where xxx(xxxx)
is my web app name and deployment slot.
I've tried to remake the deployment slot, I've recreated the web app but still no luck.