A question mark inside a box typically signifies that the system or application has encountered an issue displaying a certain character or symbol. This often happens when the font being used does not support the specific character intended to be shown.
For example, if you’re using software or a website that includes special characters (like emojis, mathematical symbols, or other non-standard text), and your font does not include these, you might see a question mark in a box instead. It serves as a visual placeholder indicating that the original character cannot be rendered properly.
To resolve this issue, you can try changing the font to one that supports a wider range of characters. Updating your software or ensuring that you’re using the latest version can also help, as many updates include improved font support.