SQLSTATE[HY000] [2002] Invalid argument (SQL: select * from information_sch ema.tables where table_schema = mamaput and table_name = migrations)

I set up my app on my virtual private server and after putting up my configuration file i get this error

(2/2) QueryException
SQLSTATE[HY000] [2002] Invalid argument (SQL: select * from `categories` where 
`vendor_id` is null).

Here is my .env file

APP_NAME=Mamaput
APP_ENV=production
APP_KEY=base64:oJ7frlsRiP5V5QuFKTwVgpoBkUDze6mZZLwawqgayHk=
APP_DEBUG=true
APP_LOG_LEVEL=debug
APP_URL=http://mama-put.com

DB_CONNECTION=mysql
DB_HOST=localhost
DB_PORT=3306
DB_DATABASE=mamaput
DB_USERNAME=root
DB_PASSWORD=B0j0p@l3

BROADCAST_DRIVER=log
CACHE_DRIVER=file
SESSION_DRIVER=file
SESSION_LIFETIME=120
QUEUE_DRIVER=sync

I am already frustrated cos everything seems okay. What am i doing wrong?

via Chebli Mohamed