disabled in the server configuration by allow_url_fopen=0

[HaithamGhanem]

I do not have to system Upgrade my back to this mistake, I do not know where the source of the error is and how the suit is possible to get help. 

[Damian Culotta · Accepted solution]

Hi @HaithamGhanem,

The problem isn't Magento related but maybe this thread can help you: https://github.com/composer/composer/issues/4740