Unable to access input parameter value with Python 3 in Rhino 8

I’m trying to use an old code example to rename a component’s input Name/NickName.

It fails in Python 3 but works fine in Python 2:

vd = ghenv.Component.Params.Input[0].VolatileData
firstItem = str(vd[0][0])

# Set names of first input parameter
ghenv.Component.Params.Input[0].Name = firstItem
ghenv.Component.Params.Input[0].NickName = firstItem

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