How to fix cURL 60 error?

Question

PHP

Good afternoon.
Given Ubuntu 14.04 with Owncloud 9.0.11 server installed on Apache2
When trying to update Owncloud gives
[GuzzleHttp\Exception\RequestException]
cURL error 60: SSL certificate problem: unable to get local issuer certificate
[GuzzleHttp\Ring\Exception\RingException]
cURL error 60: SSL certificate problem: unable to get local issuer certificate
Found a fix, add curl.cainfo = \path\to\cacert.pem in php.ini file cacert.pem itself downloaded from curl.haxx.se/ca/cacert.pem
Followed the given recommendations, errors remained. Any ideas?

Answer 1

cacert.pem itself is downloaded from curl.haxx.se/ca/cacert.pem

looks like a joke, so look for options like a certificate IGNORE
curl ssl ignore certificate

Answer 2

Use letsencrypt