Hello!
I went through the points you suggested, but when sending the test email i received the following notification:
There was a problem while sending a test email. Related debugging output is shown below:
Versions:
WordPress: 4.9.1
WordPress MS: No
PHP: 5.5.30
WP Mail SMTP: 1.2.2
Params:
Mailer: gmail
Constants: No
Client ID/Secret: Yes
Auth Code: No
Access Token: No
Server:
OpenSSL: Yes
PHP.allow_url_fopen: No
PHP.stream_socket_client(): Yes
PHP.fsockopen(): Yes
PHP.curl_version(): Yes
Apache.mod_security: No
Debug:
cURL error 77: Problem with the SSL CA cert (path? access rights?) (see https://curl.haxx.se/libcurl/c/libcurl-errors.html)
cURL error 77: Problem with the SSL CA cert (path? access rights?) (see https://curl.haxx.se/libcurl/c/libcurl-errors.html)
Error while sending via Gmail mailer: cURL error 77: Problem with the SSL CA cert (path? access rights?) (see https://curl.haxx.se/libcurl/c/libcurl-errors.html)
Do you have any suggestions?