“Unsupported 16-Bit Application” (at least as searchable by text) was seen in 2018 and 2020 mysteriously, with both fixed by uninstall and reinstall. If you do so, best to stop Duplicati first.
Although it probably won’t be today, maybe the developer will have some better ideas on that.
Your next problem if you get CommandLine.exe going is you need to double quote strings with spaces. This is standard command line practice, and would be done if you’d edited the Export.
EDIT:
You might also have --disable-module attached without a space to stuff before it. If so, space it.