Fix bug

Author: ArneBouillon

src/Utilities.jl

@@ -101,7 +101,7 @@ function _initialize_and_encode_data!(
     apply_to::AS,
 ) where {P <: DataProcessor, AS <: AbstractString}
     if proc isa PairedDataContainerProcessor
-        initialize_processor!(proc, data..., structure_mats..., apply_to)
+        initialize_processor!(proc, get_data(data)..., structure_mats..., apply_to)
     else
         input_data, output_data = get_data(data)
         input_structure_mat, output_structure_mat = structure_mats