DataTable to Excel template

[SirParser]

I'm trying to output DataTable to existing Excel template.
This is the template:

I'm populating a data table in PowerShell and then running this:
[MiniExcelLibs.MiniExcel]::SaveAsByTemplate($ExcelPath, $template, $DataTable)

The output file is empty:

What am I doing wrong or is it not supported?

[shps951023]

@HiTekBot Please use level 2 template string

[SirParser]

Thanks for the feedback.
Unfortunately I'm still stuck.

Template:

$managers = New-Object System.Data.DataTable
    $managers.Columns.Add("name");
    $managers.Columns.Add("department");
    $managers.Rows.Add("Jack", "HR");
    $managers.Rows.Add("Loan", "IT");

$value = @{title = "FooCompany"; managers = $managers}

[MiniExcelLibs.MiniExcel]::SaveAsByTemplate($FilePath, $Template, $value);

Error:
Exception calling "SaveAsByTemplate" with "3" argument(s): "Parameter count mismatch."

[SirParser]

It turns out that MiniExcel doesn't recognize HashTable class, it has to be System.Collections.Generic.Dictionary"[String,Object]"
In PowerShell it would be:
$Value = New-Object System.Collections.Generic.Dictionary"[String,Object]"
$Value.Add("title", "FooCompany")
$Value.Add("managers", $managers)