My bootcamp volume disappeared from the Startup Disk menu after the update to Catalina

Output of diskutil list:

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk1         899.0 GB   disk0s2
   3:       Microsoft Basic Data freeSpace               31.0 GB    disk0s3
   4:       Microsoft Basic Data                         70.0 GB    disk0s4

/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +899.0 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD - Data     676.5 GB   disk1s1
   2:                APFS Volume Preboot                 83.5 MB    disk1s2
   3:                APFS Volume Recovery                525.8 MB   disk1s3
   4:                APFS Volume VM                      8.6 GB     disk1s4
   5:                APFS Volume Macintosh HD            11.3 GB    disk1s5

Output of sudo gpt -vv -r show /dev/disk0:

gpt show: /dev/disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168
gpt show: /dev/disk0: Suspicious MBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: error: bogus map
gpt show: unable to open device '/dev/disk0': Undefined error: 0

Output of sudo fdisk /dev/disk0:

Disk: /dev/disk0	geometry: 121601/255/63 [1953525168 sectors]
Signature: 0xAA55
         Starting       Ending
 #: id  cyl  hd sec -  cyl  hd sec [     start -       size]
------------------------------------------------------------------------
 1: EE    0   0   2 -   25 127  14 [         1 -     409639] <Unknown ID>
 2: FF   25 127  15 - 1023 254  63 [    409640 - 1755859392] Xenix BBT   
 3: 07 1023 254  63 - 1023 254  63 [1756270592 -    9797632] HPFS/QNX/AUX
*4: 0B 1023 254  63 - 1023 254  63 [1766068224 -  187455488] Win95 FAT-32



I did use a third-party tool called MiniTool Partition Manager. However, nothing seems to have went wrong until I updated the operating system. My mac mini is from 2012 and the model is A1347. How can I fix the GPT?

I can't see my Windows files in the macOS Finder. Should it just be there as a volume? If so, it isn't there.

As for the free space, I unfortunately did use the MPT to take some of the free space into Windows. The only way I am able to see my Windows partition at all is by restarting the computer and holding option to launch the Startup Manager.

Here's the output of gdisk -l /dev/disk0:

GPT fdisk (gdisk) version 1.0.5

Warning: Devices opened with shared lock will not have their
partition table automatically reloaded!
Partition table scan:
  MBR: hybrid
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with hybrid MBR; using GPT.
Disk /dev/disk0: 1953525168 sectors, 931.5 GiB
Sector size (logical): 512 bytes
Disk identifier (GUID): 000059E6-6FD0-0000-BD37-000061470000
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 34, last usable sector is 1953525134
Partitions will be aligned on 8-sector boundaries
Total free space is 2989 sectors (1.5 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1              40          409639   200.0 MiB   EF00  EFI system partition
   2          409640      1756269031   837.3 GiB   AF0A  Customer
   3      1756270592      1816817663   28.9 GiB    0700  
   4      1816817664      1953523711   65.2 GiB    0700



It's a 2012 Mac Mini and the model is A1347. Where would I go to see the windows file on mac? I don't see the bootcamp volume in Finder.