It’s my first time use composer and i have to install slim framework. I have followed instruction on https://www.slimframework.com/docs/v3/start/installation.html . But everytime i do install, i got an error. I don’t have any idea, please help me.
The error message sounds like you have a unstable internet connection or a strong firewall and/or your DNS is poisoned.
You could try to force https connection with this settings: