A power outage messed up my mini-pc and now my pi-hole is blocking all connections on all my devices.

Here's the order everything happened:

1. Power went out and back on after a few minutes

2. My PC and my Mini-PC hosting the Pi-Hole both turned back on when the power came back.

3. My PC is only letting certain connections work. For instance, I can watch YouTube and download games on Steam, but cannot play any game that requires a network connection. In the Steam app, I see error -105 when going to the Community or Profile pages.

4. I tried to check on the Mini-PC but for some reason I cannot get it to POST. Tried multiple displays and different input devices to ensure it wasn't asleep. Tried multiple times to power cycle it.

5. I then went to my main PC to change the DNS settings so that it would no longer route me to the pi-hole and would allow all connections through. This did not work.

6. I then went to unplug the Ethernet connecting my PC to my Ubiquity Flex 2 and plugged it into my modem directly. This still didn't solve my issue, I'm still unable to access Steam or online games.

I just need help disabling and undoing everything so I can test the Mini-PC tomorrow and have it all up and running again soon. I'm just extremely illiterate when it comes to networking.