USB keyboard/mouse/devices not working in RHEL 7.3

New user here. I just installed RedHat Enterprise Linux 7.3 on a new system. After booting into the first-boot set up GUI, my keyboard and mouse are not working. They aren't even powered. I saw during the boot process these two errors:

usbserial: usb_serial_init - usb_register failed

usbserial: usb_serial_init - returning with error -19

I don't know if that's related to my problem. My keyboard/mouse are not connected via a hub, and I tried connecting to different USB ports but they still don't work. Interestingly, they work at the BIOS stage, in the RHEL GUI installer, and in the GRUB menu.

How do I fix this problem? Thanks.

BTW, I tried to re-install the whole system. While my keyboard/mouse worked during installation, they still end up unpowered/disconnected when booting into the installed OS.