接收活動 '<var>X</var>' 為傳回值指定 null 值，這對於傳回型別 '<var>Type Name</var>' 而言是無效的。 - unlocalize.com

Message in Chinese (Traditional) (中文（繁體）)

接收活動 '<var>X</var>' 為傳回值指定 null 值，這對於傳回型別 '<var>Type Name</var>' 而言是無效的。

Unlocalized message

Receive activity '<var>X</var>' has a null specified for return value which is invalid for the return type '<var>Type Name</var>'.

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