You must update your composer by using:
composer update
composer update nesbot/carbon

How to install composer on Linux Debian:

apt install curl php-cli php-mbstring git unzip
cd /
cd /tmp
curl -sS https://getcomposer.org/installer -o composer-setup.php
HASH='curl -sS https://composer.github.io/installer.sig'
echo $HASH
php -r "if (hash_file('SHA384', 'composer-setup.php') === '$HASH') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php --install-dir=/usr/local/bin --filename=composer
composer

----- OR -----

apt install composer -y
cd /tmp
curl -sS https://getcomposer.org/installer -o composer-setup.php
php composer-setup.php --install-dir=/usr/bin --filename=composer

In the web application development world, Laravel Carbon is a powerful tool for manipulating date and time. Specifically, the CarbonCarbon::setLastErrors() method of Carbon can be used to set and retrieve errors that occur during the execution of a time/date operation. This method is extremely useful in detecting, handling, and debugging time and date errors.

The setLastErrors() method is initialized with no errors and sets or retrieves the last errors occurred during the instantiation of a Carbon object with an array of errors. The errors themselves are categorized as “warnings” and “fatal” with the former indicating issues related to the specific syntax used for the Carbon object, while the latter indicating errors that will prevent the Carbon object from functioning correctly.

Therefore, with the setLastErrors() method, it is possible to modify the way Carbon will generate dates and times, allowing developers to provide faster feedback on errors. The advantage of this method is that it allows developers to parse and correct any suspicious or erroneous statements present in their code, making debugging time/date related errors much easier.

In conclusion, the CarbonCarbon::setLastErrors() method is a useful functionality provided by the Laravel Carbon library that simplifies debugging time and date related errors. This method is an invaluable tool for web application developers, allowing them to identify, handle, and debug errors faster.