Webform block not shown on front-end

Question

I'm new to using the Webform module, and started with the Contact form provided on install. I have added a Webform block to the Content region, but it doesn't show up on the front-end at all (even when I remove all restrictions such as only showing on certain pages).

I thought it might be a permissions issue, so I checked that all roles have access to see the form. When I tick "Allow users to post submissions from a dedicated URL" and choose a path, both anonymous and logged-in users can view the form at that URL. It's only when it's a block that it doesn't show up. I have also tried clearing the cache, and placing the block in other regions.

I am using Drupal 9 with Webform 6.0.0.

Edit: After some suggestions below I have also tried:

• Another theme: The issue does not happen in the parent theme of my sub-theme, narrowing it down to a possible theme-level issue.
• Deleting my theme's overrides of region.html.twig and block.html.twig. The issue persists in my theme.
• Placing a HTML comment in block.html.twig before any Twig code, to check when that file is being used (i.e. it might be loaded, but have a problem with the output code). It is not rendered at all for this specific block.

What are some other possible things that can cause the block to not show up?

Answer 1

Rather than checking the block's config in the existing instance, delete it and re-insert it, checking the settings again in the insertion screen. It now shows up for me after doing it this way.