Q: 2015 iMac Boot Camp not working giving "We couldn't create a new partition error..."

Trying to format a partition for Windows Bootcamp. Ran through the Sudo gdisk process but got an error saying it couldn't access rdisk1 at the end.

When trying to install on the windows side, I get the We "couldn't" create a new partition or locate an existing one... error

Read outs from terminal below.

Disk /dev/rdisk0: 236978176 sectors, 113.0 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): A3A67371-BA13-49FC-B8E2-0E1A6EAE308D

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 236978142

Partitions will be aligned on 8-sector boundaries

Total free space is 13 sectors (6.5 KiB)

Number  Start (sector)    End (sector)  Size       Code  Name

   1              40          409639   200.0 MiB   EF00  EFI System Partition

   2          409640       236715991   112.7 GiB   AF05  Internal Drive

   3       236715992       236978135   128.0 MiB   AB00  Booter

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Recovery/transformation command (? for help): O

Disk size is 236978176 sectors (113.0 GiB)

MBR disk identifier: 0x00000000

MBR partitions:

Number  Boot  Start Sector   End Sector   Status      Code

   1                     1    236978175   primary     0xEE

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