The {snippet} tags are not being converted

The Snippets plugin is not published

Check if the Snippets plugin is published. Go to Extensions >> Plugin manager and search for the system plugin System - Regular Labs - Snippets. Then publish it.

There is markup on the {snippet} tags

If you have copy/pasted code directly into your editor, you might also have copied along hidden HTML tags. So this will also cause the {snippet} tags to break:

{<span>snippet</span> ...}

Remove the extra styling or other html tags around and in the {snippet} tags that might cause problems.

The Snippets editor button is not showing

The editor button is only available in the Pro version of Snippets.

The Snippets plugin is not published

Check if the Snippets editor button plugin is published and the access level is set Public. Go to Extensions >> Plugin manager and search for the editor button plugin Button - Regular Labs - Snippets. Then publish it.

There are no snippets

The editor button will only be available if you have snippets. So check the Snippets component to see if you have any (published) snippets there.