Shimano error code: LO EAT
At a guess, your ebike has a main rechargeable battery and a separate coin cell battery in the controller, aka the TCD or Turbo Connect Display.
The warning says &quot;LO BAT&quot; for Low Battery, and you'll need to replace the CR2032 3V coin cell that keeps the bike's memory alive when the main battery is removed or flat.
I don't have one, but searching suggests you rotate the computer/head unit by 90 degrees, then it lifts off the mount.  Underneath is a common cr2032 access hole.  Rotate it with your fingers, or perhaps plier tips, then see the old battery inside and swap a new one in.

For more info, read the friendly manual at  https://media.specialized.com/support/collateral/0000108340.pdf
Note your odometer will be reset by changing the battery, so maybe you want to note it down first, if possible.   You may also need to re-pair the head unit with the other components, which is also described in the manual linked above.