Jetpack could not contact register_http_request_failed

You may receive the following error when you try to connect your WordPress JetPack plugin to

Jetpack could not contact register_http_request_failed. This usually means something is incorrectly configured on your web host.

Could not open handle for fopen() to

There is not single cause for this problem. The above error occurs due to following:

[1] Your website is unable to call to servers to authorize JetPack. The possible reasons may be the following:

– servers’ IP addresses are blocked in your network or at network border
– Connection problem between servers and your website server.
– IP addresses are blocked in the server firewall

[2] Another cause could be mis-configuration of the server. If PHP and Apache are not configured properly, you may face this problem.

[3] is performing maintenance from their end.

There may be other causes for this error but so far I found the above causes for this problem.

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