This is going to be a really short post. I was trying to spin up a CentOS 8 VM to revisit FreeIPA and during the installation, I could not pass the INSTALLATION SUMMARY page as shown in the picture above. I have enabled the interface and got an IP address and the image could not pull the mirror list by itself.
After looking for a mirror list, I found the mirror URL as shown in Figure 1 to be working. Select http:// from the drop-down menu then enter the mirror URL as shown in Figure 1. Click Done when done.
The CentOS mirror list can be found here. Pick your preferred mirror source then add the directory path below.
Once you are back to the INSTALLATION SUMMARY page, you will notice the Installation Source does not have the error as shown in Figure 2. At this point, you can select the Software Selection to install whatever software you wanted to install.