Tableau Server が SAML 認証用に構成されていて、SAML 応答内のユーザー名に英語以外の文字が含まれている場合に、ユーザーが Tableau Server にサインインできません。
次の SAML エラーのログが \vizportal\vizportal-<n>.log に記録されます。
ERROR com.tableausoftware.samlauthentication.model.XPathUtils - Failed to evaluate XPATH in the provided input (指定された入力内の XPATH を評価できませんでした)
org.xml.sax.SAXParseException: Invalid byte 1 of 1-byte UTF-8 sequence. (1 バイト UTF-8 シーケンスの 1 バイト目が無効です。)
または
org.xml.sax.SAXParseException: Invalid byte 2 of 3-byte UTF-8 sequence. (3 バイト UTF-8 シーケンスの 2 バイト目が無効です。)
Tableau Server 2020.4.2 にアップグレードします。
001471815

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