Widget not showing on WordPress

Most often a caching plugin serving an old page, or a security plugin stripping the script.

Custom HTML. A paragraph block escapes the code.

Yes — use the builder’s own HTML element rather than a text field.

No, but it makes updates arrive through the dashboard and avoids editing templates.

On WordPress the two usual causes are a caching plugin serving the old page and a security plugin stripping the script from the content..

The short answer

On WordPress the two usual causes are a caching plugin serving the old page and a security plugin stripping the script from the content.

Clear the cache first, because it is faster to rule out.

Caching plugin — purge all caches, including any object cache and your CDN, then hard-reload.

Security plugin — Wordfence, Sucuri and similar can strip script tags from post content. Check the plugin log, and temporarily disable to test.

The block — the code needs a Custom HTML block, not a paragraph. Pasting into a paragraph escapes the code and renders it as text.

Theme or builder — some page builders sanitise embeds in their own blocks. Use the builder’s HTML element rather than a text field.

Elementor, Divi and the rest each have their own HTML widget. Use it rather than a text block, which will usually escape the code.

Send support the page URL and the installation code, and mention which caching and security plugins are active — that is usually the answer.