@LinuxNerd14 

Sounds like the router is not getting the ISP's IP address. Sometimes the modem will not release the previous devices address. 

Try power off and unplug both the modem and router, wait 5-10 min, plug in and power up the modem and wait a bit for it to stablize, then plug in the modem and power it up, and it should now connect. 
Sometimes you need to do this a few times.

  @ArcherC8 

Thank you for the response ArcherC8.

I did what you told me with the modem being powered off for 12 minutes then plugging it into my router. I tried 4 times but I still do not get a connection. If it is helpful the modem I have is Google's GFLT100 fiber modem.

  @LinuxNerd14 

I assume the modem is in bridge mode and not transmitting wifi or anything on the Ethernet ports except the router. 
 

Does the modem have multiple ports as it may require a specific one for bridge mode. 
 

Try connecting a PC to the ethernet port instead of the router to see if that works. 

  @ArcherC8 

The modem does only have one port but I do not know if it is in bridge mode. I have tried connecting it directly to my laptop but it sits their and tries to get an IP address and never resolves it.

  @LinuxNerd14 

So the issue is before the router. Sign on to the modem and check its settings. You may need to google on how to set it in bridge mode.