Can't figure out what is wrong with a simple Turing code

New to Julia
1

This is a simple program running on a clean enviroment but it produces an error message which I could not figure out.

using Pkg
Pkg.add("Distributions")
Pkg.add("Turing")
using Distributions
using Turing

testData = rand(Beta(3, 4), 100);

@model betaSample(rawdata) = begin

    alpha ~ InverseGamma(2, 1/8)
    beta ~ InverseGamma(2, 1/8)

    for i in eachindex(rawdata)
        rawdata[i] ~ Beta(alpha, beta)
    end
end

result_MH = sample(betaSample(testData), MH(250))

Starting Julia...
               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _  |  |
  | | |_| | | | (_| |  |  Version 1.8.5 (2023-01-08)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |
 project at `~/juliascript/Turing`
LoadError: proposals of type Int64 are not supported
Stacktrace:
 [1] error(::String, ::Type, ::String)
   @ Base ./error.jl:44
 [2] proposal(x::Int64)
   @ Turing.Inference ~/.julia/packages/Turing/Suzsv/src/inference/mh.jl:13
 [3] MH(space::Int64)
   @ Turing.Inference ~/.julia/packages/Turing/Suzsv/src/inference/mh.jl:173
 [4] top-level scope
   @ ~/juliascript/Turing/Turing_Example01.jl:16
 [5] eval
   @ ./boot.jl:368 [inlined]
 [6] include_string(mapexpr::typeof(identity), mod::Module, code::String, filename::String)
   @ Base ./loading.jl:1428
in expression starting at /Users/ssiew/juliascript/Turing/Turing_Example01.jl:16
    Updating registry at `~/.julia/registries/General`
    Updating git-repo `https://github.com/JuliaRegistries/General.git`
   Resolving package versions...
  No Changes to `~/juliascript/Turing/Project.toml`
  No Changes to `~/juliascript/Turing/Manifest.toml`
   Resolving package versions...
  No Changes to `~/juliascript/Turing/Project.toml`
  No Changes to `~/juliascript/Turing/Manifest.toml`
ERROR: LoadError: proposals of type Int64 are not supported
Stacktrace:
 [1] error(::String, ::Type, ::String)
   @ Base ./error.jl:44
 [2] proposal(x::Int64)
   @ Turing.Inference ~/.julia/packages/Turing/Suzsv/src/inference/mh.jl:13
 [3] MH(space::Int64)
   @ Turing.Inference ~/.julia/packages/Turing/Suzsv/src/inference/mh.jl:173
 [4] top-level scope
   @ ~/juliascript/Turing/Turing_Example01.jl:19
 [5] eval
   @ ./boot.jl:368 [inlined]
 [6] include_string(mapexpr::typeof(identity), mod::Module, code::String, filename::String)
   @ Base ./loading.jl:1428
in expression starting at /Users/ssiew/juliascript/Turing/Turing_Example01.jl:19

julia> 
(Turing) pkg> status
Status `~/juliascript/Turing/Project.toml`
  [31c24e10] Distributions v0.25.87
  [fce5fe82] Turing v0.24.3

(Turing) pkg>
2

The problem was the construction of HM. According to the documentation:

  MH(space...)

  Construct a Metropolis-Hastings algorithm.

  The arguments space can be

    •  Blank (i.e. MH()), in which case MH defaults to using the prior for each parameter as the proposal distribution
...

So if you use an empty constructor (i.e., MH()), it will work as intended. There are options for passing other samplers or custom functions.