MethodError: no method matching eachcolumn, on basic example

[IanButterworth]

The bug

julia> using Mux, WebIO, TableView
[ Info: Precompiling Mux [a975b10e-0019-58db-a62f-e48ff68538c9]

julia> WARNING: redefining constant known_mimetypes
WARNING: redefining constant singleton_instance
WARNING: redefining constant routing_callback
WARNING: redefining constant webio_server_config

julia> WebIO.webio_serve(showtable(rand(10,10)))
ERROR: MethodError: no method matching eachcolumn(::Tables.MatrixRow{Array{Float64,2}})
Closest candidates are:
  eachcolumn(::Union{Function, Type}, ::Tables.Schema{names,nothing}, ::Any) where names at /Users/ian/.julia/packages/Tables/okt7x/src/utils.jl:109
  eachcolumn(::Union{Function, Type}, ::Tables.Schema{names,types}, ::Any) where {names, types} at /Users/ian/.julia/packages/Tables/okt7x/src/utils.jl:66
Stacktrace:
 [1] table2json(::Tables.MatrixTable{Array{Float64,2}}, ::NTuple{10,Symbol}, ::NTuple{10,DataType}; requested::Nothing) at /Users/ian/.julia/packages/TableView/kqtYa/src/TableView.jl:210
 [2] table2json at /Users/ian/.julia/packages/TableView/kqtYa/src/TableView.jl:204 [inlined]
 [3] _showtable_sync!(::Scope, ::NTuple{10,Symbol}, ::NTuple{10,DataType}, ::Tables.MatrixTable{Array{Float64,2}}, ::Array{NamedTuple{(:headerName, :editable, :headerTooltip, :field, :sortable, :resizable, :type, :filter),Tuple{Symbol,Bool,DataType,Symbol,Bool,Bool,String,String}},1}, ::Int64, ::Bool, ::String, ::WebIO.JSString) at /Users/ian/.julia/packages/TableView/kqtYa/src/TableView.jl:145
 [4] showtable(::Tables.MatrixTable{Array{Float64,2}}; dark::Bool, height::Symbol, width::String, cell_changed::Nothing) at /Users/ian/.julia/packages/TableView/kqtYa/src/TableView.jl:139
 [5] showtable at /Users/ian/.julia/packages/TableView/kqtYa/src/TableView.jl:62 [inlined]
 [6] #showtable#1 at /Users/ian/.julia/packages/TableView/kqtYa/src/TableView.jl:46 [inlined]
 [7] showtable(::Array{Float64,2}) at /Users/ian/.julia/packages/TableView/kqtYa/src/TableView.jl:46

Context

(@v1.4) pkg> st Mux WebIO TableView
Status `~/.julia/environments/v1.4/Project.toml`
  [a975b10e] Mux v0.7.1
  [40c74d1a] TableView v0.4.1
  [0f1e0344] WebIO v0.8.14

julia> versioninfo()
Julia Version 1.4.2
Commit 44fa15b150* (2020-05-23 18:35 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin18.7.0)
  CPU: Intel(R) Core(TM) i7-8850H CPU @ 2.60GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-8.0.1 (ORCJIT, skylake)

[IanButterworth]

Reposted on TableView JuliaComputing/TableView.jl#50