Here after akeneo installed 2.3 icecat version
after logged in still loading ...
how do I solve this ???
in log file
[2019-04-16 13:11:20] request.ERROR: Uncaught PHP Exception Symfony\Component\HttpKernel\Exception\NotFoundHttpException: "No route found for "GET //form/extensions" (from "http://ttttt.equpo.com/pim-community-standard/web/")" at /home/equpo/public_html/ake/pim-community-standard/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/EventListener/RouterListener.php line 144 {"exception":"[object] (Symfony\Component\HttpKernel\Exception\NotFoundHttpException(code: 0): No route found for \"GET //form/extensions\" (from \"http://tttt.equpo.com/pim-community-standard/web/\") at /home/equpo/public_html/ake/pim-community-standard/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/EventListener/RouterListener.php:144, Symfony\Component\Routing\Exception\ResourceNotFoundException(code: 0): at /home/equpo/public_html/ake/pim-community-standard/var/cache/prod/appProdProjectContainerUrlMatcher.php:3128)"} []
It appears as if you missed something during setup process. Broken down, the version 2.3 manual lists the following steps to setup an Akeneo system:
composer install --optimize-autoloader --prefer-dist
yarn install
php bin/console --env=prod cache:clear --no-warmup
php bin/console --env=prod pim:installer:assets --symlink --clean
yarn run webpack
Try those things, it should initialize everything - usually this helps already.