cURL error 60: SSL: no alternative certificate subject name matches target host name 'oauth2.googleapis.com'

Hi,

I'm running a live app on forge/hetzner. it was working fine till today, my app runs every five minutes a command which syncs google calendar events to my app. Since morning i'm getting the following error:

cURL error 60: SSL: no alternative certificate subject name matches target host name 'oauth2.googleapis.com'

i've searched on google and tried following:

1. downloaded cacert.pem file
2. placed it in "/etc/nginx/ssl/app.mysite.be/1754848"
3. edited php.ini file

[curl] ; A default value for the CURLOPT_CAINFO option. This is required to be an ; absolute path. curl.cainfo = "/etc/nginx/ssl/app.mysite.be/1754848/cacert.pem"

1. restarted server
2. ive printed phpinfo() and made sure CURLOPT_CAINFO was loaded

since it's a live app i don't want to disable any checks/verifying..

kind regards,

Askin