Answer:
A potential problem that could cause this is if there's an issue with the DHCP.
Step-by-step explanation:
Firstly, without a valid IP address your computer cannot use the network. Some of the problems can that can make an IP address invalid, are address conflicts with other computers and network configuration problems.
The Dynamic Host Configuration Protocol (DHCP) is the network service in routers that offers a convenient way to automatically assign IP addresses to computers joining a network. So when the IEEE 802.11 wireless client device connects to the wireless network, it should be assigned an IP address automatically. However, DHCP-generated addresses can sometimes cause problems. This happens when Windows assigns the IEEE 802.11 wireless client device an address before your Internet router does. The IP address may be invalid if it conflicts with the network's address range. Therefore, making the device not to connect to the wireless network.