Hi John,
Error 0xc0000185 ("STATUS_IO_DEVICE_ERROR") means "The I/O device reported an I/O error." The disk is inaccessible or the BCD is corrupt.
Plrease boot into Windows RE and run Startup Repair and post the results here. Reference: Startup Repair | Microsoft Support
Also, in Windows RE Command Prompt, run the following commands:
bcdedit
diskpart
list disk
select disk 0
list part
list vol
exit
Please take photos of the output screen on your phone and share them here. After seeing the output, will post the remaining commands.