Hyper-v default switch issue

Hi everyone. I have a question about my default switch in Hyper-V. I was editing some info in the IPv4 which is what I believe, the cause of my current problems. Basically I misunderstood some school-task, and ended up deleting the already set-up IP and DNS from Default switch -> Setup -> IPv4 -> IPv4 Setup. So basically activating DHCP. Before this, the network inside the VM had no issue. Any idea how to fix this? Been googling, asking fellow students and teachers.

Tried deactivating Hyper-V and reinstalling it.

Any suggestions are warmly welcomed!