Laravel по-русски

could not find driver (SQL: select * from `categories`)

composer update

$ composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - laravel/framework v5.4.36 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.9 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.8 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.7 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.6 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.5 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.4 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.36 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.35 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.34 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.33 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.32 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.31 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.30 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.3 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.29 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.28 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.27 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.26 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.25 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.24 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.23 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.22 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.21 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.20 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.2 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.19 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.18 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.17 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.16 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.15 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.14 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.13 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.12 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.11 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.10 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.1 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.4.0 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - Installation request for laravel/framework 5.4.* -> satisfiable by laravel/framework[v5.4.0, v5.4.1, v5.4.10, v5.4.11, v5.4.12, v5.4.13, v5.4.14, v5.4.15, v5.4.16, v5.4.17, v5.4.18, v5.4.19, v5.4.2, v5.4.20, v5.4.21, v5.4.22, v5.4.23, v5.4.24, v5.4.25, v5.4.26, v5.4.27, v5.4.28, v5.4.29, v5.4.3, v5.4.30, v5.4.31, v5.4.32, v5.4.33, v5.4.34, v5.4.35, v5.4.36, v5.4.4, v5.4.5, v5.4.6, v5.4.7, v5.4.8, v5.4.9].

  To enable extensions, verify that they are enabled in your .ini files:
    - /etc/php/7.3/cli/php.ini
    - /etc/php/7.3/cli/conf.d/10-mysqlnd.ini
    - /etc/php/7.3/cli/conf.d/10-opcache.ini
    - /etc/php/7.3/cli/conf.d/10-pdo.ini
    - /etc/php/7.3/cli/conf.d/15-xml.ini
    - /etc/php/7.3/cli/conf.d/20-calendar.ini
    - /etc/php/7.3/cli/conf.d/20-ctype.ini
    - /etc/php/7.3/cli/conf.d/20-dom.ini
    - /etc/php/7.3/cli/conf.d/20-exif.ini
    - /etc/php/7.3/cli/conf.d/20-fileinfo.ini
    - /etc/php/7.3/cli/conf.d/20-ftp.ini
    - /etc/php/7.3/cli/conf.d/20-gd.ini
    - /etc/php/7.3/cli/conf.d/20-gettext.ini
    - /etc/php/7.3/cli/conf.d/20-iconv.ini
    - /etc/php/7.3/cli/conf.d/20-imagick.ini
    - /etc/php/7.3/cli/conf.d/20-json.ini
    - /etc/php/7.3/cli/conf.d/20-mysqli.ini
    - /etc/php/7.3/cli/conf.d/20-pdo_mysql.ini
    - /etc/php/7.3/cli/conf.d/20-phar.ini
    - /etc/php/7.3/cli/conf.d/20-posix.ini
    - /etc/php/7.3/cli/conf.d/20-readline.ini
    - /etc/php/7.3/cli/conf.d/20-shmop.ini
    - /etc/php/7.3/cli/conf.d/20-simplexml.ini
    - /etc/php/7.3/cli/conf.d/20-sockets.ini
    - /etc/php/7.3/cli/conf.d/20-sysvmsg.ini
    - /etc/php/7.3/cli/conf.d/20-sysvsem.ini
    - /etc/php/7.3/cli/conf.d/20-sysvshm.ini
    - /etc/php/7.3/cli/conf.d/20-tokenizer.ini
    - /etc/php/7.3/cli/conf.d/20-wddx.ini
    - /etc/php/7.3/cli/conf.d/20-xmlreader.ini
    - /etc/php/7.3/cli/conf.d/20-xmlwriter.ini
    - /etc/php/7.3/cli/conf.d/20-xsl.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

$ sudo apt-get install php7.2-mbstring

Уже установлен пакет php7.2-mbstring самой новой версии (7.2.16-1+ubuntu18.04.1+deb.sury.org+1).

php -m

$ php -m
[PHP Modules]
calendar
Core
ctype
date
dom
exif
fileinfo
filter
ftp
gd
gettext
hash
iconv
imagick
json
libxml
mysqli
mysqlnd
openssl
pcntl
pcre
PDO
pdo_mysql
Phar
posix
readline
Reflection
session
shmop
SimpleXML
sockets
sodium
SPL
standard
sysvmsg
sysvsem
sysvshm
tokenizer
wddx
xml
xmlreader
xmlwriter
xsl
Zend OPcache
zlib

[Zend Modules]
Zend OPcache