乍一看，它可能已经为现在尝试查找的类别创建了一个新属性，但是找不到.

At a guess it could have created a new attribute for the categories that it is now trying to find, but it cannot.

浏览您的eav_attribute表，查看其中是否有任何内容.更好的是，浏览扩展安装脚本以查看它是否添加了任何属性.

Look through your eav_attribute tables and see if there is anything in there. Better yet, go through the extensions install scripts to see if it added any attributes.