From message ,that server current use legacy bios mode boot up. hpe b140i sw raid mode is NOT supported in this mode.
It request server reboot with UEFI mode bootloader, what OS your server running now ? It may just some wrong boot sequence after power failed, reboot and press F11 with boot up menu to check what UEFI loader your have.
You also will need instal HPE SSA software to config or read error message from Raid card in online mode.
You could use SSA windows version or Esxi SSA cli mode version.