error laravel on attendize (MySQL server has gone away or Access denied for user 'root'@'localhost' (using password: YES))

I tried install https://github.com/Attendize/Attendize on my server but after install i got this several errors when i tried

DB_TYPE=mysql
DB_HOST=111.11.1.111
DB_PORT=3306
DB_DATABASE=attendize
DB_USERNAME=root
DB_PASSWORD=attendize

i got this error SQLSTATE[HY000]: General error: 2006 MySQL server has gone away

and when i tried

DB_TYPE=mysql
DB_HOST=localhost
DB_PORT=3306
DB_DATABASE=attendize
DB_USERNAME=root
DB_PASSWORD=attendize

i got this error Access denied for user 'root'@'localhost' (using password: YES)

what should i do?

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