Unhandled rejection ReferenceError

[jackfromeast]

hexo g可以正常生成，但是hexo s的启动的时候访问会报如下的错：

Unhandled rejection ReferenceError: ./MyBlog/themes/indigo-plus/layout/post.ejs:9
    7| %>
    8| <div class="container body-wrap">
 >> 9|     <%- partial('_partial/post', {post: page }) %>
    10| </div>
    11| 

 .//MyBlog/themes/indigo-plus/layout/_partial/post.ejs:17
    15|         </div>
    16| 
 >> 17|         <%- partial('post/copyright') %>
    18|         <%- partial('post/reward-btn') %>
    19| 
    20|         <div class="post-footer">

 ./MyBlog/themes/indigo-plus/layout/_partial/post/copyright.ejs:6
    4|         <%- partial('updated') %>
    5|         <% if(theme.postMessage) {%>
 >> 6|         <%- _.template(theme.postMessage)(locals) %>
    7|         <% } %>
    8|     </div>
    9|     <% } %>

_ is not defined
    at eval (./MyBlog/themes/indigo-plus/layout/_partial/post/copyright.ejs:21:17)
    at copyright (./MyBlog/node_modules/ejs/lib/ejs.js:682:17)
    at _View._compiledSync (./MyBlog/node_modules/hexo/lib/theme/view.js:132:24)
    at _View.renderSync (./MyBlog/node_modules/hexo/lib/theme/view.js:59:25)
    at Object.partial (./MyBlog/node_modules/hexo/lib/plugins/helper/partial.js:34:15)
    at eval (./MyBlog/themes/indigo-plus/layout/_partial/post.ejs:39:17)
    at post (./MyBlog/node_modules/ejs/lib/ejs.js:682:17)
    at _View._compiledSync (./MyBlog/node_modules/hexo/lib/theme/view.js:132:24)
    at _View.renderSync (./MyBlog/node_modules/hexo/lib/theme/view.js:59:25)
    at Object.partial (./MyBlog/node_modules/hexo/lib/plugins/helper/partial.js:34:15)
    at eval (./MyBlog/themes/indigo-plus/layout/post.ejs:23:17)
    at post (./MyBlog/node_modules/ejs/lib/ejs.js:682:17)
    at _View._compiled (./MyBlog/node_modules/hexo/lib/theme/view.js:136:50)
    at _View.render (./MyBlog/node_modules/hexo/lib/theme/view.js:39:17)
    at ./MyBlog/node_modules/hexo/lib/hexo/index.js:64:21
    at tryCatcher (./MyBlog/node_modules/bluebird/js/release/util.js:16:23)
    at ./MyBlog/node_modules/bluebird/js/release/method.js:15:34
    at RouteStream._read (./MyBlog/node_modules/hexo/lib/hexo/router.js:47:5)
    at RouteStream.Readable.read (internal/streams/readable.js:481:10)
    at resume_ (internal/streams/readable.js:977:12)
    at processTicksAndRejections (internal/process/task_queues.js:82:21)