Magento – Magento 2.0 “something went wrong”

I could not find a solution for date parsing issue yet. But as per sample data installing you can try below commands from your installation directory.

php bin/magento sampledata:deploy
php bin/magento setup:upgrade

then compile if required

php bin/magento setup:di:compile

You should check the var/logs folder to see if something went wrong and also your server logs.

For me the issue was related to this one https://github.com/magento/magento2/issues/5418.

Gone into db table cataloginventory_stock_item and delete duplicates and then the issue dissapeared.

If that doesn't solve it, you can try:

1) cd into pub/static and run find . -depth -name .htaccess -prune -o -delete

2) cd into root folder and run rm -rf var/cache/ var/generation/ var/page_cache/ var/view_preprocessed/

3) run php bin/magento setup:static-content:deploy

If this doesn't solve it you could take the radical option to reinstall:

1) delete the vendor folder rm -rf vendor/* and also the composer.lock file in root.

2) run composer install