It is the first thing you need to fix the issue as stated above. For that, you need to run the virtual machine showing the error and go to the Devices > Install Guest ...

Workstations manufactured in the 1990s and early 2000s, before Wi-Fi became prevalent, often lack wireless networking cards or adapters that enable a computer to detect and interpret Wi-Fi signals.

If your computer doesn't have built-in Wi-Fi or an ethernet port, or if those connections aren't working properly, you're not stuck without internet. USB ports offer multiple ways to get online, ...