Thanks, Trapta. I tried to apply that, but something isn't quite right and I'm still getting the error images above. Please help! :) Here's my code:

<section class="section hero">
<div class="hero-inner">
{{search submit=false instant=true class='search search-full'}}
</div>
</section>

<div class="container">
<section class="section knowledge-base">
<section class="categories blocks">
<ul class="blocks-list">
{{#each categories}}
<li class="blocks-item">
<a href='{{url}}' class="blocks-item-link">

{{#is id 200400187}}<img class="" src="{{asset 'skillup_b.png'}}" />{{/is}}
{{#is id 200423338}}<img class="" src="{{asset 'innovation_b.png'}}" />{{/is}}
{{#is id 115002189847}}<img class="" src="{{asset 'timetable_b.png'}}" />{{/is}}

<h4 class="blocks-item-title">{{name}}</h4>
<p class="blocks-item-description">{{excerpt description}}</p>
</a>
</li>
{{/each}}
</ul>
{{pagination}}
</section>

{{#if promoted_articles}}
<section class="articles">
<h3>{{t 'promoted_articles'}}</h3>
<ul class="article-list promoted-articles">
{{#each promoted_articles}}
<li class="promoted-articles-item">
<a href="{{url}}">
{{title}}
</a>
</li>
{{/each}}
</ul>
</section>
{{/if}}
</section>

{{#if help_center.community_enabled}}
<section class="section community">
<h2>{{t 'community'}}</h2>
{{#link 'community' class='community-link'}}
{{t 'join_conversation'}}
{{/link}}

{{#link 'community' class='community-link'}}
<div class="community-image"></div>
{{/link}}
</section>
{{/if}}

<section class="section activity">
{{recent_activity}}
</section>
</div>