[Bug] Error when using accents (diacritics) in words

[navakelvin]

If you use a diacritic (á, ó, í, é), you get the following error:

anki: ...m-data\site\pack\packer\start\anki.nvim/lua/anki/api.lua:135: ...m-data\site\pack\packer\start\anki.nvim/lua/anki/api.lua:23: anki.nvim: AnkiConnect Error 'utf-8' codec can't decode byte 0xf3 in position 415: invalid continuation byte
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[rareitems]

It works on my machines. and it kind of looks like it might be Windows issue.
It looks like the error is about with the file encoding of the file you open nvim with, 0xf3 is a byte sequence for á in latin1 file encoding and AnkiConnect expects your message encoded in UTF-8
Try doing
:set encoding=utf-8 and :set fileencoding=utf-8
saving the file and then trying to send