Hi @szannou!
There are a few other topics that mention an error message that says invalid type() suboption. The most common reason is an encoding issue: odkmeta requires that the survey and choices CSV files contain only ASCII characters, not Unicode. For example, the text Only use the option “Other” if the name is completely different seems to contain curly quotes, which are not ASCII characters. See the discussion here and here for more information about this issue.
Hope this helps!