Troubleshooting of Warning: file_get_contents(...): failed to open stream

This type of problem occurs due to certain settings of your server. You may get errors like:

The file_get_contents() is not allowed to open files with a scheme of https://.

file_get_contents(): https:// wrapper is disabled in the server configuration by allow_url_fopen=0

To solve the issue:

• Enable allow_url_fopen option in your cPanel https://is.gd/R6A8GN. If you can't do it yourself, contact your hosting support. 
• Make sure the "https:// wrapper" is included for the allow_url_fopen directive. Contact your hosting support and ask to enable the "https:// wrapper"

If after the steps the error message is still displayed, contact your hosting support and provide the full error message to get some clarification about the issue.