Georgi

Hello, I bought cctv systems from eBay, but I can't enter the menu even with an administrator password, I know you don't have to write a password there, but even when the field is empty, it doesn't allow me and writes me the invalid password, please help

Hello, I bought cctv systems from eBay, but I can't enter the menu even with an administrator password, I know you don't have to write a password there, but even when the field is empty, it doesn't allow me and writes me the invalid password, please help