Missing vendor files, try running "composer install" or use the Wizard installer?

Question

OctoberCMS

After adding the illuminate/html plugin to laravel, the site opens with an error:
Missing vendor files, try running "composer install" or use the Wizard installer.
I updated the composer, still the same problem remained, what could it be, what else would you advise me to do to fix this problem?

Answer 1

The command
composer install
simply installs the missing files.
The error is due to the fact that there are no plugin files, the command above should install them.
The composer update is done by another command.