When I try to install app to store I receive an error Failed to connect to store-name.myshopify.com port 443: Connection refused in file generate_token.php
for generating access token I use curl_init to https://store-name.myshopify.com/admin/oauth/access_token. To request I also add client_id and client_secret.
This app is also installed to another store and on this store in log files I receive error like this
