Неожиданная ошибка при установке плагинов WordPress

Я устанавливал civicrm и получил ошибку при попытке установить какой-нибудь плагин wp.
При попытке сделать это вручную я получил ту же ошибку. Другие сообщили, что это должно работать.
Это происходит для всех плагинов, которые я пытаюсь установить

Я не могу понять, что может быть не так. Я пытался обновить openssl а также php5-curl как я читал это онлайн на каком-то форуме. Перезапуск apache тоже не помог.

Когда я захожу на страницу «Установить плагин», я получаю те же ошибки. Изменение таймаута в wp-admin/includes/plugin-install.php для функции wp_remote_post() с 15 до 60 заработало. Но это не хорошо, так как это основной файл. Кроме того, темы не работают, если я делаю это.

ajk@ajk-ThinkPad-R60:~/buildkit/build/wpmaster/wp-content/plugins$ wp plugin install civicrm-admin-utilities --debug
Debug: No readable global config found (0.029s)
Debug: Using project config: /home/ajk/Documents/civi/civicrm-buildkit/build/wpmaster/wp-cli.yml (0.034s)
Debug: ABSPATH defined: /home/ajk/Documents/civi/civicrm-buildkit/build/wpmaster/ (0.121s)
Debug: Begin WordPress load (0.121s)
Debug: wp-config.php path: /home/ajk/Documents/civi/civicrm-buildkit/build/wpmaster/wp-config.php (0.122s)
Debug: Loaded WordPress (0.724s)
Debug: Running command: plugin install (0.725s)
PHP Notice:  An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="https://wordpress.org/support/">support forums</a>. (WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.) in /home/ajk/Documents/civi/civicrm-buildkit/build/wpmaster/wp-admin/includes/plugin-install.php on line 158
PHP Stack trace:
PHP   1. {main}() /home/ajk/Documents/civi/civicrm-buildkit/bin/wp:0
PHP   2. include() /home/ajk/Documents/civi/civicrm-buildkit/bin/wp:4
PHP   3. include() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/boot-phar.php:5
PHP   4. WP_CLI\Runner->start() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/wp-cli.php:21
PHP   5. WP_CLI\Runner->_run_command() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/WP_CLI/Runner.php:723
PHP   6. WP_CLI\Runner->run_command() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/WP_CLI/Runner.php:320
PHP   7. WP_CLI\Dispatcher\Subcommand->invoke() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/WP_CLI/Runner.php:313
PHP   8. call_user_func() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/WP_CLI/Dispatcher/Subcommand.php:294
PHP   9. WP_CLI\Dispatcher\CommandFactory::WP_CLI\Dispatcher\{closure}() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/WP_CLI/Dispatcher/Subcommand.php:294
PHP  10. call_user_func() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/WP_CLI/Dispatcher/CommandFactory.php:52
PHP  11. Plugin_Command->install() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/WP_CLI/Dispatcher/CommandFactory.php:52
PHP  12. WP_CLI\CommandWithUpgrade->install() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/commands/plugin.php:445
PHP  13. Plugin_Command->install_from_repo() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/WP_CLI/CommandWithUpgrade.php:141
PHP  14. plugins_api() phar:///home/ajk/Documents/civi/civicrm-buildkit/bin/wp/php/commands/plugin.php:297
PHP  15. trigger_error() /home/ajk/Documents/civi/civicrm-buildkit/build/wpmaster/wp-admin/includes/plugin-install.php:158
Warning: civicrm-admin-utilities: An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="https://wordpress.org/support/">support forums</a>.