Wiped SSD but Cannot Boot Anymore

Hi, I performed a successful ATA Secure Erase on my WD SSD (comes installed). This went fine. Upon going to turn computer back on after shutting it down, it only opens to a message:

Dell Security Manager

Hard Drive #######, the system internal HDD-0, is protected by a password authentication system. You cannot access data on this hard drive without the correct password. Please type in thehard drve password.

I put in the password and I get:

No bootable devices found

Press F1 key to retry boot.

Press F2 key for setup utility.

Press F5 key to run onboard dignostics.

I don't need to keep any data on the computer, I'm actually trying to get back in to do a factory reset, so if there's a way to do that without any of this that works also. The computer was running only on Ubuntu 18.04.