The isn't a bug or a frustrating hurdle; it is a security feature designed to protect your digital signage network. While it can be annoying the first time you lose a code due to a timeout, understanding the system makes future installations seamless.
If you have already discarded the packaging, do not worry. You can find the physical sticker on the device: prism plus registration code
A: Yes and no. The monitor will work as a standard HDMI screen without a code. However, you lose remote content management, scheduling, and automatic brightness. For "smart" features, the code is mandatory. The isn't a bug or a frustrating hurdle;