ResolutionTry one of the following workarounds.
Change the data type of the field from String to Date/Date Time, not creating DATE() or DATETIME().
Use DATEPARSE() to replace DATE()
Add "appSettings" session with locale value to this fixed config file. The file is located under C:\Program Files\Tableau\Tableau Prep Builder <Version>\resources\app\default-settings.json.
It is necessary to add "appSettings" session at the end of the file, which should be a separate session from "featureFlags" session.
Shown below as an example:
Locale value should be:
zh_CN - 简体中文
fr_FR - Français
de_DE - Deutsch
ja_JP - 日本語
ko_KR - 한국어
pt_BR - Português
es_ES - Español
zh_TW - 繁體中文 supported since Tableau Prep 2019.2
en_GB - English (UK) supported since Tableau Prep 2019.2