I'm trying to create a Shopify app and getting one of two errors. On one machine I get redirect_url and application url must have matching hosts. On the other I get redirect_uri is not whitelisted In shopify I've verified my URLs several times Application URL https://myapplication.domain.com/shopify Allowed redirection URLs https://myapplication.domain.com/shopify/install.php https://myapplication.domain.com/shopify/get_token.php https://myapplication.domain.com I've tried with and without trailing slashes on the Application URL No change in behavior I've tried removing the https:// from the front This complains of a bad URL I've confirmed no typos in the URLs The errors don't change on the 2 machines on each attempt to update the code. How do I start troubleshooting or what additional info can I provide?