TypeError:无法读取未定义的属性“ toString”,地图未加载

我在这里阅读过其他类似的问题,但我不是开发人员,所以我需要一个针对初学者(或虚拟傻瓜)的答案,以尝试修复我的小网站。

我收到此错误,这使我的目录网站无法加载地图上的列表(因此使网站无法正常工作):

JQMIGRATE: Migrate is installed, version 1.4.1
map-template.js?ver=1.0.0:669 Uncaught TypeError: Cannot read property 'toString' of undefined
    at Object.<anonymous> (map-template.js?ver=1.0.0:669)
    at Function.each (jquery.js?ver=1.12.4-wp:2)
    at HTMLSelectElement.<anonymous> (map-template.js?ver=1.0.0:668)
    at Function.each (jquery.js?ver=1.12.4-wp:2)
    at Object.apply_meta_filter (map-template.js?ver=1.0.0:660)
    at Object.filter (map-template.js?ver=1.0.0:556)
    at Object.success (map-template.js?ver=1.0.0:195)
    at i (jquery.js?ver=1.12.4-wp:2)
    at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4-wp:2)
    at x (jquery.js?ver=1.12.4-wp:4)
(anonymous) @ map-template.js?ver=1.0.0:669
each @ jquery.js?ver=1.12.4-wp:2
(anonymous) @ map-template.js?ver=1.0.0:668
each @ jquery.js?ver=1.12.4-wp:2
apply_meta_filter @ map-template.js?ver=1.0.0:660
filter @ map-template.js?ver=1.0.0:556
(anonymous) @ map-template.js?ver=1.0.0:195
i @ jquery.js?ver=1.12.4-wp:2
fireWith @ jquery.js?ver=1.12.4-wp:2
x @ jquery.js?ver=1.12.4-wp:4
c @ jquery.js?ver=1.12.4-wp:4
XMLHttpRequest.send (async)
send @ jquery.js?ver=1.12.4-wp:4
ajax @ jquery.js?ver=1.12.4-wp:4
n.<computed> @ jquery.js?ver=1.12.4-wp:4
getJSON @ jquery.js?ver=1.12.4-wp:4
init @ map-template.js?ver=1.0.0:182
(anonymous) @ map-template.js?ver=1.0.0:2029
(anonymous) @ map-template.js?ver=1.0.0:2282

我可以自己解决这个问题吗?

非常感谢您的帮助! 亲切的问候, 米拉

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hiure
hiure

It's hard to understand a problem without some detailed context. But, what I can see, that you are trying to show some list, where some list items are not defined (undefined) or have undefined fields. So these undefined values cannot be converted into strings (toString()).

我可能是错的,但是我建议的是检查要显示的所有项目及其字段的存在。

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