bug: Trying to download pathman via CircleCI

[Rasbats]

Describe the bug

Trying this build: https://ci.appveyor.com/project/Rasbats/shipdriver-pi#L447

Pathman failed to install.

Installing pathman
    Fetching install script ...
    Downloading from
      https://webi.ms/api/installers/pathman.ps1
        ?formats=zip,exe,tar,git&libc=msvc
      Saved C:\Users\appveyor\.local\tmp\pathman.install.ps1
Downloading pathman from https://git.rootprojects.org/root/pathman/releases/download/v0.5.2/pathman-v0.5.2-windows-amd64.zip to C:\Users\appveyor\Downloads\webi\pathman-v0.5.2-windows-amd64.zip
curl: (22) The requested URL returned error: 502
Move-Item : Cannot find path 'C:\Users\appveyor\Downloads\webi\pathman-v0.5.2-windows-amd64.zip.part' because it does
not exist.
At C:\Users\appveyor\.local\tmp\pathman.install.ps1:173 char:5
+     & Move-Item "$pkg_download.part" "$pkg_download"
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (C:\Users\appvey...-amd64.zip.part:String) [Move-Item], ItemNotFoundExce
   ption
    + FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.MoveItemCommand

To Reproduce

Try to download pathman from https://git.rootprojects.org/root/pathman/releases/download/v0.5.2/pathman-v0.5.2-windows-amd64.zip

Produces 502 bad gateway.

Device / Machine (please complete):

CircleCI

Additional context

Prevents Windows builds of plugins for the OpenCPN navigation program.