If both system language and option language are set to Japanese (ja) or the other language except for en-us, the following exception error will occur when executing a workflow of purchase requisition.
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(Japanese) 「この作業項目に関連付けられたテキストが、割り当て先の言語で見つかりません。また、システムや法人の既定の言語でも見つかりません。このエラーのため、ワークフローは処理を停止しました。システム管理者に相談してください。」
(English) “The text associated with this work item cannot be found in the assignee’s language, or in the default language for the system or legal entity. The workflow has stopped processing because of this error. Contact your system administrator for assistance.”
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The error will occur both platform update 3&4 when the languages are set except English (United States) (en-US). And the error will occur on .

Because the error were caused by the translation unavailable of workflow message in selected language, please to be available the localization.