The {snippet} tag remains visible

The system plugin is disabled

Go to System > Manage > Plugins, search for System - Regular Labs - Snippets, and make sure it is enabled.

The tag does not match the configured syntax

Check Snippet tag and Tag Characters in the Snippets configuration. Changing either setting does not rewrite existing tags.

There is markup inside the tag

Copying styled text into an editor can add hidden HTML inside the tag. For example, this is not a valid Snippets tag:

{<span>snippet</span> alias="copyright"}

View the editor's HTML source or clear the tag's formatting, then enter the tag as plain text.

Snippets is disabled for this component PRO

In Pro, check Disable on Components. Depending on Remove in Disabled Components, a tag in a disabled component is either left unchanged or removed.

The tag disappears but no snippet content is shown

This means the tag was processed. Check that the referenced ID, alias, or title exists and that the snippet is published.

Enable the global Place HTML comments setting and inspect the page's HTML source. Snippets can then add a diagnostic comment when a snippet is missing, unpublished, or recursively references one already being rendered. These comments are not normally visible on the rendered page.

If the tag is in the document head, check both the global and per-snippet Enable in HTML Head choices. The Remove choice intentionally removes the tag without inserting its content.

The Snippets editor button is not showing

The editor-button plugin is disabled

Go to System > Manage > Plugins, search for Button - Regular Labs - Snippets, and make sure it is enabled with the appropriate access level.

The button is inside the CMS Content menu

In current Joomla editors, open the CMS Content menu below the editor and select Snippet.

You are editing on the frontend PRO

The administrator editor button is shared by Free and Pro. Frontend editor-button availability is Pro-only and must be enabled in the Snippets configuration.

A particular snippet is missing from the list PRO

Open that snippet and check Show in Editor Button List. No hides it from every list, while Only in Admin hides it from frontend lists.