Jelly Repeatable inside Repeatable

[JoshuadV]

Hi there,

Im trying to figure out how I can get the data from the following Jelly file into my builder.

<f:repeatable header="Exe File" add="Add new Exe" minimum="1" field="ExeFilePath">
    <f:textbox/>
    <div align="right">
        <f:repeatableDeleteButton></f:repeatableDeleteButton>
    </div>
    <f:repeatable header="Ini File" add="Add new Ini" minimum="1">
            <f:textbox/>
            <f:checkbox title="Check for False Alert" value="Checkbox"></f:checkbox>
        <div align="right">
            <f:repeatableDeleteButton></f:repeatableDeleteButton>
        </div>
    </f:repeatable>
</f:repeatable>

I tried pretty much everything I found in the net, and also tried to figure out on my own how it works but I found no solution (yet).
It already works that the data is saved in the xml File, but 1. it is not shown in the config and 2. when i add another entry to an existing repeatable,
it crashes with this Exception:
java.lang.ClassCastException: JSON keys must be strings.

Hope you guys have any hints for me :)

Thanks in advance,

Joshua