"Sylius was not able to figure out the current cart" error

Just switch to needed channel in Symfony Debug Toolbar.

Cannot add product to cart, indefined index

You should in Admin pages add to your first shipping method amount for new channel, it should not be null.

Cannot install sylius/locale

run composer require sylius/locale ^v1.0.0-beta.1

symfony+aimeos+extadm: infinite "loading..."

Can be fixed by adding in your php.ini string: always_populate_raw_post_data = -1


Got from https://aimeos.org/help/help-f15/installed-aimeos-with-laravel-screen-stuck-at-expert-mode-t721.html

Intellij Idea - "gradle project sync failed" in Android project

Press "Refresh all Gradle projects" in View > Tool Windows > Gradle

CKEditor + Symfony - Cannot read property 'icons'

Be sure in config.yml in "extraPlugins" plugin name is the same as in specified plugin's file plugin.js first row, for example: "CKEDITOR.plugins.add( 'filepreview', {", where 'filepreview' is config.yml's plugin name.

Sonata-Media PublicDownloadStrategy not working in Prod environment

After changing config.yml file, do not forget to clear prod cache (app/console cache:clear -e prod)