Several days ago I couldn\'t access the admin panel on my site based on prestashop platform. After entering login and password, I was redirected to login page again and ever
In case you've moved prestashop from a local version or from another domain, in addition of the classic.
update ps_configuration table set value="www.myshop.com" where name ="PS_SHOP_DOMAIN";
update ps_configuration table set value="www.myshop.com" where name ="PS_SHOP_DOMAIN_SSL";
Check the table called ps_shop_url, and update domain and domain_ssl field, and physical_url as well.
Example:
update ps_shop_url set domain='www.myshop.com', domain_ssl='www.myshop.com', physical_url='/';