OPC UA and Arrays

I am trying to send some arrays (Array of String, Array of Int...) to my PLC but I can not figure out the right way. When I try to send an array of String it only sends the first value of the array while the rest seems to get "corrupted" (I do not understand what is happening there). The array values 2-10 that were defined in the PLC as String accept only one char after I inject the array from Node Red. I would appreciate any help.

OK. I replaced the "null" with "0" and it works with string. But it still won't work with datatype Int and Boolean

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