i Get ContextErrorException error

[massio]

Hello everybody,

i'm new in prestashop communite and i'm not familliar with php.

i try to create a new theme for a store so i install prestashop in localhost via composer using 

composer create-project prestashop/prestashop

then i go to the install-dev directory and launch installation script:

 php index_cli.php --domain=127.0.0.1 --db_name=prestashop --db_user=root --db_password=

after that i run this command in main directory

composer install

 but when i try login i get an error in attachment.

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the 2nd method in download zip file and unzip it in htdocs in my localhost and follow the steps to install it, after finish i try to install composer and when i login the first page not styling