I saw this as I was trying to access a Mandarin Deck
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Anki 2.1.9 (ae67c976) Python 3.6.7 Qt 5.12.1 PyQt 5.11.3
Platform: Mac 10.16
Flags: frz=True ao=False sv=1
<class ‘UnicodeEncodeError’>: ‘ascii’ codec can’t encode characters in position 21-22: ordinal not in range(128)