The Customiser > Layout > Sidebars > Single Post Sidebar Layout is where you assign the global setting. Let me know.
EDIT: Ok, so looking at the Site, the right sidebar is set for the single post. But is not being output. This is most likely a plugin conflict, first thing i would test is to remove the adverts and see if that fixes the problem.
Hi there, it looks like the problem is resolved, before you updated i found this ad code which was breaking the sidebar – see my comment against the </div>:
<p style="text-align: left;"><div class='code-block code-block-6' style='margin: 8px 0; clear: both;'>
<script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<ins class="adsbygoogle"
style="display:block"
data-ad-format="autorelaxed"
data-ad-client="######"
data-ad-slot="#####"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});</div> /* This </div> is not required and is breaking the sidebar */
</p>
Thank you David. Actually the ad code works fine. It’s a code from Google and i use the same code over more than 20 websites.
What’s breaking the theme seems to be the plugin AdInserter
Everything works fine when it’s deactivated. However, it’s a problem since the shortcodes are placed manually on 130+ articles. It’s a very important plugin for the site.
Yes, the ad code is fine, its the additional </div> which is being inserted (presumably) by the plugin that is causing the issue. You may need to reach out to the plugin author for help.