If there is a problem with SSL certificate, no error is shown.

[dan979]

Greetings.

I was having troubles to send the notifications since I got no errors at all, not even in the log file. I figured out the problem was the SSL certificate when I tried the web-push-php-example and got the certificate error message:

SSL certificate problem: unable to get local issuer certificate"

Once I fixed the certificate following the steps specified in the web-push-php repository everything worked fine.