我已经向 facebook 提交了一个简单的“投票”开放图操作。但由于某种原因，它旁边有一条红色的“需要更改”消息，而不是绿色的“活动”消息。此外，当我单击该操作以检查其设置时，顶部会显示一条消息：
Status: Changes needed
Your submission is missing a preposition (ex: on, in, through).
Please add the appropriate preposition and resubmit.
Please make changes below and resubmit for review.
我的Action设置如下：
Define Action Type
Name : Vote
Connected object types: Photo
Configure Story Text
Tenses Supported:Stories for this action should be shown in: both past and present tenses.
Past Tense: Joe voted on [My-app-name]
Plural Past Tense: Joe and two other friends voted
Present Tense: Joe is voting
Plural Present Tense: Joe and two other friends are voting
Imperative Tense: Hey Joe, vote this
我没有向此操作添加任何自定义属性。在提交我的开放图形操作时，我以前从未遇到过这个问题。我究竟做错了什么？