Why are plug-in extensions not loading?

Question

Yii

It was necessary to transfer the modules (one of them is https://github.com/dvizh/yii2-cart)
from the vendor folder to the common/modules folder.
This action was guided by the instructions
https://ru.stackoverflow.com/questions/784561/ How-...
I connected everything, when I entered composer update, all extensions associated with these modules

were deleted. Now they are missing and how can I properly connect, load?
I thought that autoload would automatically include dependencies and when updating everything would load again, but no.

"autoload": {
    	"psr-4": {
            "dvizh\\cart\\": "common/modules/dvizh/yii2-cart",
            "dvizh\\order\\": "common/modules/dvizh/yii2-order",

So far, I see only one way out - to collect the necessary repositories from these modules and insert them into the main composer.json
. Any other solutions?

Answer 1

composer dump-autoload