Bootcamp say's "Can’t download the software because of a network problem."

This

./brigadier -h

will show you the usage similar to

Usage: brigadier [options]

Options:
  -h, --help            show this help message and exit
  -m MODEL, --model=MODEL
                        System model identifier to use (otherwise this
                        machine's model is used). This can be specified
                        multiple times to download multiple models in a single
                        run.
  -i, --install         After the installer is downloaded, perform the install
                        automatically. Can be used on Windows only.
  -o OUTPUT_DIR, --output-dir=OUTPUT_DIR
                        Base path where the installer files will be extracted
                        into a folder named after the product, ie.
                        'BootCamp-041-1234'. Uses the current directory if
                        this option is omitted.
  -k, --keep-files      Keep the files that were downloaded/extracted. Useful
                        only with the '--install' option on Windows.
  -p PRODUCT_ID, --product-id=PRODUCT_ID
                        Specify an exact product ID to download (ie.
                        '031-0787'), currently useful only for cases where a
                        model has multiple BootCamp ESDs available and is not
                        downloading the desired version according to the post
                        date.

This will actually run the download for a Mac - MacBook8,1 model. The -m qualifier will default to your Mac's model. The -o specifies an output directory for the downloaded file.

./brigadier -m MacBook8,1 -o Bootcamp-MacBook8.1
Using Mac model: MacBook8,1.

Model supported in package distribution file at http://swcdn.apple.com/content/downloads/28/26/031-24514/qx7ph7k6mewtcf4eyhxmiilgc7r2ikjgud/031-24514.English.dist.

Distribution 031-24514 supports the following models: MacBook8,1, MacBookAir5,1, MacBookAir5,2, MacBookAir6,1, MacBookAir6,2, MacBookAir7,1, MacBookAir7,2, MacBookPro9,1, MacBookPro9,2, MacBookPro11,1, MacBookPro11,2, MacBookPro11,3, MacBookPro11,4, MacBookPro11,5, MacBookPro12,1, MacPro6,1, Macmini6,1, Macmini6,2, Macmini7,1, iMac13,1, iMac13,2, iMac13,3, iMac14,1, iMac14,2, iMac14,3, iMac14,4, iMac15,1.

Making directory Bootcamp-MacBook8.1/BootCamp-031-24514..

Fetching Boot Camp product at URL http://swcdn.apple.com/content/downloads/28/26/031-24514/qx7ph7k6mewtcf4eyhxmiilgc7r2ikjgud/BootCampESD.pkg.

100.0% 1633591296 / 1633586781 bytes
Expanding flat package...

Extracting Payload...

Extracted to Bootcamp-MacBook8.1/BootCamp-031-24514/WindowsSupport.dmg.

Done.

This is the file that will be downloaded...

MyName-rMBP:brigadier-master MyName$ cd Bootcamp-MacBook8.1/
MyName-rMBP:Bootcamp-MacBook8.1 MyName$ ls -lt
total 0
drwxr-xr-x  3 MyName  staff  102 Aug 13 11:57 BootCamp-031-24514
MyName-rMBP:Bootcamp-MacBook8.1 MyName$ cd BootCamp-031-24514/
MyName-rMBP:BootCamp-031-24514 MyName$ ls -lt
total 3188544
-rw-r--r--  1 MyName  staff  1632530665 Aug 12 00:59 WindowsSupport.dmg
MyName-rMBP:BootCamp-031-24514 MyName$ pwd
/Users/MyName/Documents/brigadier-master/Bootcamp-MacBook8.1/BootCamp-031-24514
MyName-rMBP:BootCamp-031-24514 MyName$ ls 
WindowsSupport.dmg
MyName-rMBP:BootCamp-031-24514 MyName$ openssl md5 WindowsSupport.dmg 
MD5(WindowsSupport.dmg)= a3d3e4f4a950fe6b47c4cb55f7cd7e02

• Mount the .dmg by double-clicking it in macOS Finder
• Erase/Format a USB2 Flash drive as MBR/FAT
• Drag the top-level folders and files to the USB2
• Boot into Windows with the USB2 connected
• Run setup.exe from the Bootcamp folder.

• What is the year/model of your Mac (do not post the serial number)?
• These drivers seem to be for W7/W8.1, because you have a Bootcamp.xml and a Bootcamp64.xml file. In either of these files, you should have a line which shows the Product Version. Can you post it? It will look similar to

<ProductManufacturer>Apple Inc.</ProductManufacturer>
<ProductVersion>6.0.6136</ProductVersion>
<ProductCode>{FCFFE6B6-BAE8-490E-88D0-097A9DA1C43D}</ProductCode>

• Can you verify that your Mac is capable of installing W10? See Install Windows 10 on your Mac with Boot Camp Assistant - Apple Support for reference.

Did you follow the steps in Install Windows on your older Mac using Boot Camp - Apple Support ? Be aware that macOS High Sierra and older versions have issues with W10 1903 ISO and later versions.

Are you using a wired network connection?

Also, you can use Brigadier (https://github.com/timsutton/brigadier) as an alternative.

If the Download is failing during the Bootcamp Assistant processing, but works with Brigadier, you have either file system corruption on your Mac or you have intermittent network connectivity.

If you downloaded an ISO from Microsoft, that is not correct. You need to Download and install Windows support software on your Mac - Apple Support.

See Windows 10 Install failure - Apple Community for reference.

The Windows ISO is not required. You only need the drivers as mentioned in the Download link I posted. Posting it here again.

Download and install Windows support software on your Mac - Apple Support.

What is the year/model of your Mac (do not post the serial number)?

Hero_Master67 wrote:

I don't have an Intel Processor, I think.

Bootcamp Assistant only works on Intel CPU Macs. If you downloaded Boot Camp Support Software 4.0.4033, then your Mac should be one of these models.

Post Date: Mar 14, 2013

File Size: 601.76

System Requirements 

• MacBook (13-inch, Late 2006)
• MacBook (13-inch, Mid 2007)
• MacBook (13-inch, Late 2007)
• MacBook (13-inch, Early 2008)
• MacBook (13-inch, Late 2008)
• MacBook (13-inch, Early 2009 & Mid 2009)
• MacBook (13-inch, Late 2009) *
• MacBook (13-inch, Mid 2010) *
• MacBook Air (13-inch, Early 2008)
• MacBook Air (13-inch, Late 2008 & Mid 2009)
• MacBook Air (11-inch & 13-inch, Late 2010) *
• MacBook Pro (15-inch & 17-inch, Core 2 Duo)
• MacBook Pro (15-inch & 17-inch, 2.2 & 2.4GHz)
• MacBook Pro (15-inch & 17-inch, Early 2008) *
• MacBook Pro (15-inch, Late 2008) *
• MacBook Pro (17-inch, Early 2009 & Mid 2009) *
• MacBook Pro (15-inch, Early 2009) *
• MacBook Pro (13-inch and 15-inch, Mid 2009) *
• MacBook Pro (13-inch,15-inch, and 17-inch, Mid 2010)
• MacBook Pro (13-in, 15-inch, and 17-inch, Early 2011 & Late 2011)
• Mac Pro (Mid 2006)
• Mac Pro (Early 2008) *
• Mac Pro (Early 2009)
• Mac Pro (Early 2007)
• Mac Pro (Mid 2010)
• Mac Pro (15-inch and 17-inch, 2.2 & 2.4GHz)
• Mac mini (Mid 2007)
• Mac mini (Early 2009 & Late 2009)
• Mac mini (Mid 2010) *
• iMac (17-inch, Late 2006)
• iMac (20-inch, Late 2006)
• iMac (24-inch, Late 2006)
• iMac (20-inch & 24-inch, Mid 2007)
• iMac (20-inch & 24-inch, Early 2008)
• iMac (20-inch, Early 2009 & Mid 2009)
• iMac (21.5-inch & 27-inch, Late 2009) *
• iMac (27-inch, Late 2009) *
• iMac (21.5-inch, Mid 2010) *
• iMac (27-inch, Mid 2010)
• iMac (21.5-inch, Mid 2011 & Late 2011)
• iMac (27-inch, Mid 2011)

all these drivers support Windows 7, 32 bit

* drivers that support Windows 7, 32 and 64 bit

What is the current macOS version?

What is the year/model of your Mac (do not post the serial number)?

Can you see Windows files in macOS Finder?

The file should be called WindowsSupport.dmg, not brigadier.dmg. Can you post the log of the brigadier run?