I am new to Julia, and trying to write to a tokens.json file. However, I keep getting various errors.

Consider a Dict() data,

open("tokens.json", "w") do f
    JSON.print(f, data)
end

I keep getting the error:

SystemError: opening file "tokens.json": Invalid argument

Stacktrace:
 [1] systemerror(p::String, errno::Int32; extrainfo::Nothing)
   @ Base .error.jl:176
 [2] systemerror
   @ .error.jl:175 [inlined]
 [3] open(fname::String; lock::Bool, read::Nothing, write::Nothing, create::Nothing, truncate::Bool, append::Nothing)
   @ Base .iostream.jl:293
 [4] open
   @ .iostream.jl:275 [inlined]
 [5] open(fname::String, mode::String; lock::Bool)
   @ Base .iostream.jl:356
 [6] open(fname::String, mode::String)
   @ Base .iostream.jl:355
 [7] open(::var"#17#18", ::String, ::Vararg{String}; kwargs::@Kwargs{})
   @ Base .io.jl:394
 [8] open(::Function, ::String, ::String)
   @ Base .io.jl:393
 [9] top-level scope
   @ In[47]:1

I’ve tried use_mmap=false and every other fix I’ve seen online.