Can't install PHP modules in Plesk: /usr/bin/sed: not found

Symptoms

The installation of PHP modules like memcached or APCu fails

running: phpize
/opt/plesk/php/7.4/bin/phpize: line 61: /usr/bin/sed: No such file or directory
grep: write error: Broken pipe
/opt/plesk/php/7.4/bin/phpize: line 62: /usr/bin/sed: No such file or directory
grep: write error: Broken pipe
/opt/plesk/php/7.4/bin/phpize: line 63: /usr/bin/sed: No such file or directory
grep: write error: Broken pipe
Configuring for:
PHP Api Version:
Zend Module Api No:
Zend Extension Api No:
/opt/plesk/php/7.4/bin/phpize: line 154: /usr/bin/sed: No such file or directory
autoheader: error: AC_CONFIG_HEADERS not found in configure.ac
ERROR: `phpize' failed

Cause

The sed utility, used during the PHP extension installation process, is misconfigured or missing.

Resolution

To fix the problem, reinstall the package.

Note: The package name may differ from the instructions below depending on the operating system

1. Log in to the server over SSH

2. Run this command to reinstall sed

   # dnf reinstall sed -y || apt install --reinstall sed -y