Hi @hope_yeu
Welcome to the community forums.
This community forums is a very good platform to ask the questions and try to help others.
You can also find related information on StackExchange and you can start diving into the http://devdocs.magento.com/
You can get idea about already reported/existing issue from Github: https://github.com/magento/magento2/issues
if issue solved,Click Kudos & Accept as Solution
