But the error has the same reason - somewhere you use convert(DataFrame, d) where d is your dict, while you should write DataFrame(d). Here is an example:
julia> d = Dict{Any,Any}("a"=>1:3, "b"=>4:6)
Dict{Any, Any} with 2 entries:
"b" => 4:6
"a" => 1:3
julia> DataFrame(d)
3×2 DataFrame
Row │ a b
│ Int64 Int64
─────┼──────────────
1 │ 1 4
2 │ 2 5
3 │ 3 6