HTTP 404 error on adding package by dependency DiffRules

BTW a local clone via Git works. So I guess it’s not an networking issue.

PS C:\Users\a97812\GitHub> git clone https://github.com/JuliaDiff/DiffRules.jl.git
Cloning into 'DiffRules.jl'...
remote: Enumerating objects: 376, done.
remote: Total 376 (delta 0), reused 0 (delta 0), pack-reused 376
Receiving objects: 100% (376/376), 65.68 KiB | 1.82 MiB/s, done.
Resolving deltas: 100% (212/212), done.

So I tried to install that way in julia - with an other error

(v1.0) pkg> add https://github.com/JuliaDiff/DiffRules.jl.git
   Cloning git-repo `https://github.com/JuliaDiff/DiffRules.jl.git`
ERROR: failed to clone from https://github.com/JuliaDiff/DiffRules.jl.git, error: GitError(Code:ERRO
R, Class:OS, failed to set credentials: Falscher Parameter.
)

(Falscher Parameter means wrong parameter)

So I tried to install from local file clone above - and I suceeded

(v1.0) pkg> add C:\\Users\\a97812\\GitHub\\DiffRules.jl
   Cloning git-repo `C:\\Users\\a97812\\GitHub\\DiffRules.jl`
  Updating git-repo `C:\\Users\\a97812\\GitHub\\DiffRules.jl`
 Resolving package versions...
  Updating `C:\Users\a97812\.juliapro\JuliaPro_v1.0.3.1\environments\v1.0\Project.toml`
  [b552c78f] + DiffRules v0.0.7+ #master (C:\\Users\\a97812\\GitHub\\DiffRules.jl)
  Updating `C:\Users\a97812\.juliapro\JuliaPro_v1.0.3.1\environments\v1.0\Manifest.toml`
  [b552c78f] + DiffRules v0.0.7+ #master (C:\\Users\\a97812\\GitHub\\DiffRules.jl)

(v1.0) pkg> add Flux
 Resolving package versions...
  Updating `C:\Users\a97812\.juliapro\JuliaPro_v1.0.3.1\environments\v1.0\Project.toml`
  [587475ba] + Flux v0.6.9
  Updating `C:\Users\a97812\.juliapro\JuliaPro_v1.0.3.1\environments\v1.0\Manifest.toml`
  [1520ce14] + AbstractTrees v0.2.1
  [79e6a3ab] + Adapt v0.4.1
  [bbf7d656] + CommonSubexpressions v0.2.0
  [163ba53b] + DiffResults v0.0.3
  [587475ba] + Flux v0.6.9
  [f6369f11] + ForwardDiff v0.10.1
  [872c559c] + NNlib v0.4.3

(v1.0) pkg> add Gadfly
 Resolving package versions...
  Updating `C:\Users\a97812\.juliapro\JuliaPro_v1.0.3.1\environments\v1.0\Project.toml`
  [c91e804a] + Gadfly v1.0.0
  Updating `C:\Users\a97812\.juliapro\JuliaPro_v1.0.3.1\environments\v1.0\Manifest.toml`
  [49dc2e85] + Calculus v0.4.1
  [a81c6b42] + Compose v0.7.1
  [7ad07ef1] + CoupledFields v0.1.0
  [01453d9d] + DiffEqDiffTools v0.7.1
  [c91e804a] + Gadfly v1.0.0
  [a1b4810d] + Hexagons v0.2.0
  [5ab0869b] + KernelDensity v0.5.1
  [d3d80556] + LineSearches v7.0.1
  [4345ca2d] + Loess v0.5.0
  [d41bc354] + NLSolversBase v7.1.1
  [429524aa] + Optim v0.17.2
  [85a6dd25] + PositiveFactorizations v0.2.1