SSD not showing in boot order

[TACO_BOY14]

I went to start my computer the other day, and the computer gave me an error saying something like "Boot Manager missing, press Ctrl+Alt+Del to restart."
I went into BIOS to see if one of my drives failed, but they are still both recognized. My problem is the SSD I boot windows from is not showing in the boot order but is showing under the boot menu option. Any help would be appreciated, Thanks.

I am on an ASUS motherboard with UEFI bios

TL;DR: SSD is bootable manually but not automatically as it isn't showing up in my boot order.

 

[TACO_BOY14]

To any future people who may have a problem similar to this, you can fix this problem by resetting the CMOS to reset bios settings

To clear the CMOS:
Turn off all peripheral devices connected to the computer and unplug the computer from the wall.
Remove the computer cover.
Locate the battery on the board. (This is usually a small watch type battery.)
With a medium flat-bladed screwdriver, gently pry the battery free from its connector.
With the computer still unplugged and the battery still removed, hold the power button for 15 seconds to purge any power left in the system.
Reinstall the battery.
Plug computer back in.
Put cover back into place.
start your PC and reconfigure your bios settings.
Do a barrel roll!

 

[James Wiggin]

Most motherboards nowadays have a Clear CMOS button on them too.