I installed magento, and theme. 

but i cannot have the menu working.

I then try to install full demo, I start to import the sql, but 500 error during import. after I modify the secure/unsecure url, I run the script php bin/magento setup:upgrade, but it return "Requested store is not found" 

how to do ...?

Eddie

Sorry, I solved this.

I use the quickstart sql and successfully import the database. then everything fine