Curl error thrown for http POST to. Can't connect to the site?

Question

linux

To make it easier to understand the situation:
I have php 7.2
ubuntu linux server installed.
curl is enabled. chromedriver
is installed globally in usr/bin and launched by the following command Chrome is also installed via: I use the library: Facebook\WebDriver I run the php script on the server (which runs without errors on Windows on openserver. Everything is the same there (chromedriver is running)). And after a long wait, it produces the following:
chromedriver --url-base=/wd/hub --port=4444
apt install google-chrome-stable

PHP Fatal error:  Uncaught Facebook\WebDriver\Exception\WebDriverCurlException: Curl error thrown for http POST to /session/b4917a4836b5925d97d0ba62a2b8ac27/url with params: {"url":"ссылка"}

Operation timed out after 30001 milliseconds with 0 bytes received in /var/www/site.ru/public_html/web/vendor/php-webdriver/webdriver/lib/Remote/HttpCommandExecutor.php:331
Stack trace:
#0 /var/www/site.ru/public_html/web/vendor/php-webdriver/webdriver/lib/Remote/RemoteWebDriver.php(590): Facebook\WebDriver\Remote\HttpCommandExecutor->execute(Object(Facebook\WebDriver\Remote\WebDriverCommand))
#1 /var/www/site.ru/public_html/web/vendor/php-webdriver/webdriver/lib/Remote/RemoteWebDriver.php(252): Facebook\WebDriver\Remote\RemoteWebDriver->execute('get', Array)
#2 /var/www/site.ru/public_html/web/index.php(22): Facebook\WebDriver\Remote\RemoteWebDriver->get('https://ссылка....')
#3 {main}
  thrown in /var/www/site.ru/public_html/web/vendor/php-webdriver/webdriver/lib/Remote/HttpCommandExecutor.php on line 331

What could be the problem ? Why is it unable to execute the get command?
Everything works on Windows...