---
title: Troubleshooting the PublishPress Revisions Plugin
description: "This guide has advice for fixing various problems that users sometimes find the with [the PublishPress Revisions plugin](https://publishpress.com/revisions/). --- ## Revisions are Missing From the Queue If some revisions are missing from the [Revision Queue](https://publishpress.com/links/links/revision-queue), you can disable a performance…"
url: "https://publishpress.com/knowledge-base/troubleshooting-revisionary/"
updated: "2025-11-16"
category: PublishPress Revisions / Troubleshooting Revisions
---

# Troubleshooting the PublishPress Revisions Plugin

This guide has advice for fixing various problems that users sometimes find the with [the PublishPress Revisions plugin](https://publishpress.com/revisions/).

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## Revisions are Missing From the Queue

If some revisions are missing from the [Revision Queue](https://publishpress.com/links/links/revision-queue), you can disable a performance enhancement for better compatibility with themes and plugins.

- Go to Revisions > Settings > Revision Creation > Compatibility Mode
- Choose a different mode for "Compatibility Mode" box.

---

## iframe or scripts Tags are Missing

If you see HTML tags such as "iframe" or "scripts" being stripped from revisions, make sure that your user has the [unfiltered html](https://publishpress.com/wordpress-permissions/unfiltered_html/) permission.

This solution may also work if revisions are converting characters such as "&" to HTML code such as `&`

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## Preview Button is Not Working

There is some variation in how themes respond to revision previews. Please try adjusting the following plugin setting:

- Revisions > Settings > Options.
- Change the options for "Preview Link Type".

![Preview link type](https://publishpress.com/wp-content/uploads/2019/03/preview-link-type-1024x425.png)

---

## The unfiltered_html Capability is Required

You may see a message that reads: "The [unfiltered_html](https://publishpress.com/links/unfiltered_html) capability is required to create a revision of this post."

This happens because of a restriction in WordPress. The [unfiltered_html](https://publishpress.com/links/unfiltered_html) capability grants users the ability to use HTML such as `script`, `style`, and `iframe` in WordPress posts. If you a user does not has this capability and tries to create a revision for a post with this kind of HTML, they will not be able to create the revision.