导语：WordPress常常会发布新的版本，增加新的功能或修复某个BUG。那么有时候，我们在自动升级后会遇到打开网页显示“Briefly unavailable for scheduled maintenance”（例行维护，暂时不可用）的情况。或者是WordPress中文版的提示：正在执行例行维护，请一分钟后回来。我们来看看官方是怎么解答这个问题的。
Warning: copy(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 546
Warning: copy(): Failed to enable crypto in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 546
Warning: copy(https://www.wordpressleaf.com/wp-content/themes/summerleaf/images/tx/8.png): failed to open stream: operation failed in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 546
Warning: copy(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 562
Warning: copy(): Failed to enable crypto in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 562
Warning: copy(https://www.wordpressleaf.com/wp-content/themes/summerleaf/images/tx/69.png): failed to open stream: operation failed in /opt/lampp/htdocs/wordpresssummer/wp-content/themes/summerleaf/inc/summer_setting.php on line 562
