- CURL library install
API call to messages/send failed: SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
CURL does not come with a default CA certs bundle (Certificate Authorities certificates bundle) anymore and since there is no CA certs, SSL peer verifications will fail.
One solution is to disable peer verifications for CURL requests, but that defeats the purpose of having SSL in the first place.
We need to simply install a CA bundle for CURL to use.