[Error] unknown block tag: mathjax

[NFLSCode]

when i put the demo's post 'hexo theme cutie v2.x tutorial' in my /source/_posts and hexo g，it gave me an error. This is the whole msg:

INFO  Validating config
INFO  Start processing
FATAL {
  err: Error [Nunjucks Error]: _posts/hello-world.md [Line 95, Column 189] unknown block tag: mathjax
      =====               Context Dump               =====
      === (line number probably different from source) ===
    90 | <h2 id="Icon-sets"><a href="#Icon-sets" class="headerlink" title="Icon sets"></a>Icon sets</h2><h3 id="Select-an-icon-set"><a href="#Select-an-icon-set" class="headerlink" title="Select an icon set"></a>Select an icon set</h3><dl><dt>Minimal version</dt><dd><code>v2.0.5-beta</code></dd></dl><dl><dt>Configuration file</dt><dd><code>source/_data/cutie.yml</code></dd></dl><dl><dt>Configuration format</dt><dd>Change icon set by changing the name of the icon set in the following snippet. There are three available icon sets in the theme by default: <code>blue-line</code>, <code>blue-shadow</code>, and <code>colorful-outlined</code>.</dd></dl><pre><code>&lt;!--code26--&gt;
    91 | </code></pre>
    92 | <dl><dt>Default configuration</dt><dd><code>blue-line</code></dd></dl><p>Illustration</p>
    93 | <h3 id="Add-a-new-icon-set"><a href="#Add-a-new-icon-set" class="headerlink" title="Add a new icon set"></a>Add a new icon set</h3><dl><dt>Minimal version</dt><dd><code>v2.0.5-beta</code></dd></dl><dl><dt>Configuration path</dt><dd><code>source/images/</code></dd></dl><dl><dt>Configuration steps</dt><dd>1. Create a folder named <code>icons</code> in <code>source/images/</code> folder.<br>    2. Create an icon set folder <code>icon-set-name</code>(change it to your desired name) in <code>source/images/icons/</code> folder.<br>    3. Add your own four icons (keep the filename consistent) in <code>svg</code> format to <code>source/images/icons/icon-set-name/</code> folder.<br>        1. <code>search.svg</code><br>        2. <code>archive.svg</code><br>        3. <code>menu.svg</code><br>        4. <code>toc.svg</code><br>    4. Use your new icon set name <code>icon-set-name</code> in <a href="#select-an-existing-icon-set">Select an existing icon set</a></dd></dl><h2 id="Comment-systems"><a href="#Comment-systems" class="headerlink" title="Comment systems"></a>Comment systems</h2><h3 id="Select-comment-systems"><a href="#Select-comment-systems" class="headerlink" title="Select comment systems"></a>Select comment systems</h3><dl><dt>Minimal version</dt><dd><code>v2.0.0-alpha</code></dd></dl><dl><dt>User configuration location</dt><dd><code>source/_data/cutie.yml</code></dd></dl><dl><dt>Configuration format</dt><dd>&#96;&#96;&#96;yml comment system<br>    global:<br>      comment_system: valine # Available values: valine, gitment, disqus<br>    <!--code27--><br>    See <a href="https://valine.js.org/">https://valine.js.org</a> to setup the backend and fill the values.</dd></dl><dl><dt>Default values</dt><dd>No default values, must fill if using the system.</dd></dl><h3 id="Configuration-for-gitment-comment-system"><a href="#Configuration-for-gitment-comment-system" class="headerlink" title="Configuration for gitment comment system"></a>Configuration for gitment comment system</h3><dl><dt>Minimal version</dt><dd><code>v2.0.0-alpha</code></dd></dl><dl><dt>User configuration location</dt><dd><code>source/_data/cutie.yml</code></dd></dl><dl><dt>Configuration format</dt><dd>&#96;&#96;&#96;yml gitment configuration<br>    gitment:<br>      owner:<br>      repo:<br>      client_id:<br>      client_secret:<br>    <!--code28--><br>    See <a href="https://help.disqus.com/customer/portal/articles/466208-what-s-a-shortname-">https://help.disqus.com/customer/portal/articles/466208-what-s-a-shortname-</a> to setup the backend and fill the value.</dd></dl><dl><dt>Default values</dt><dd>No default values, must fill if using the system.</dd></dl><h3 id="Configuration-for-Livere-comment-system"><a href="#Configuration-for-Livere-comment-system" class="headerlink" title="Configuration for Livere comment system"></a>Configuration for Livere comment system</h3><dl><dt>Minimal version</dt><dd><code>v2.0.11</code></dd></dl><dl><dt>User configuration location</dt><dd><code>source/_data/cutie.yml</code></dd></dl><dl><dt>Configuration format</dt><dd><code>yml livere configuration     livere:       id: &#39;city&#39; # use &#39;city&#39; if using free version or `premium` if using paid version       uid:      </code><br>    The <code>uid</code> is the string you will see in the snippet provided by livere during installation, as shown in the following screenshot.</dd></dl><pre><code>![Livere setup screenshot](livere_setup.png)
    94 | </code></pre>
    95 | <dl><dt>Default values</dt><dd>No default values, must fill if using the system.</dd></dl><h2 id="Math-Test"><a href="#Math-Test" class="headerlink" title="Math Test"></a>Math Test</h2>{% mathjax %}
    96 | $\gamma = \cfrac{1}{n_{jm}} \sum_{x_i \in R_{i,j}}y_i - F_{m-1}(x_i)$
    97 | {% endmathjax %}
    98 | 
      =====             Context Dump Ends            =====
      at formatNunjucksError (/home/ppip/codes/blog/node_modules/hexo/lib/extend/tag.js:171:13)
      at /home/ppip/codes/blog/node_modules/hexo/lib/extend/tag.js:246:36
      at tryCatcher (/home/ppip/codes/blog/node_modules/bluebird/js/release/util.js:16:23)
      at Promise._settlePromiseFromHandler (/home/ppip/codes/blog/node_modules/bluebird/js/release/promise.js:547:31)
      at Promise._settlePromise (/home/ppip/codes/blog/node_modules/bluebird/js/release/promise.js:604:18)
      at Promise._settlePromise0 (/home/ppip/codes/blog/node_modules/bluebird/js/release/promise.js:649:10)
      at Promise._settlePromises (/home/ppip/codes/blog/node_modules/bluebird/js/release/promise.js:725:18)
      at _drainQueueStep (/home/ppip/codes/blog/node_modules/bluebird/js/release/async.js:93:12)
      at _drainQueue (/home/ppip/codes/blog/node_modules/bluebird/js/release/async.js:86:9)
      at Async._drainQueues (/home/ppip/codes/blog/node_modules/bluebird/js/release/async.js:102:5)
      at Async.drainQueues [as _onImmediate] (/home/ppip/codes/blog/node_modules/bluebird/js/release/async.js:15:14)
      at process.processImmediate (node:internal/timers:471:21) {
    line: 95,
    location: '\x1B[35m_posts/hello-world.md\x1B[39m [Line 95, Column 189]',
    type: 'unknown block tag: mathjax'
  }
} Something's wrong. Maybe you can find the solution here: %s https://hexo.io/docs/troubleshooting.html

And npm list:

[email protected] /home/ppip/codes/blog
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