So while I was printing through cura, the printer was disconnected from the port for some reason. I could not do anything through the LCD and had to turn off my printer to re-connect. I had cura open through the terminal and had this error.
@alexei: The serial port on the Archim board is managed by the CPU, so if the code crashes, the serial port will go down. This is different from what happens on the Rambo/MiniRambos. Unfortunately, this does make debugging difficult. Keep in mind Marlin is still in 2.0.0 Alpha stage at this point, so bugs are expected.