Solution
Tuples are indexed data structures. The index of each element of a tuple should be the same in the TestStand container variable, to receive the correct data type in the respective variable.
For this, after you create the container with the variables inside, be sure that you are seeing them in the Variables pane ordered by index and not alphabetically.
You can see this on the Name column of the Variables pane. If you see an arrow on the column it means that the variables are ordered alphabetically. To change the order mode click on the Name column.
For example, this is the order of the variables using alphabetical order (Notice the arrow on the Name column):
And this is the order of the same container ordered by index:
The index order is different from the order in the tuple of tuples, so TestStand will show the Run-Time Error.
In the indexed order mode of the variables, reorganize the elements in the same order as the Python code by dragging and dropping them. This will allow TestStand to receive the data and pass the values to the correct elements of the container.