Downloading update from http://downloads.wordpress.org/release/wordpress-4.8.1-new-bundled.zip…
Download failed.: SSL certificate problem, verify that the CA cert is OK. Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
Installation Failed
WHen the updating failed. You can adding some code in functions.php by file manager.
add_action('http_request_args', 'jkudish_http_request_args', 10, 2);
function jkudish_http_request_args($args, $url) {
$args['sslverify'] = false;
return $args;
}
The position should be at the end of the functions.php
After adding above code into your functions.php, go to back to your admin area and click update again. You will get
WordPress update successfully. Update your theme, you will find the code you just added disappear.