Pixelgrade LT Compatibility and Post-Update Troubleshooting

Use this guide when your Pixelgrade LT site starts behaving oddly after a WordPress, theme, or plugin update.

Pixelgrade LT works with WordPress 6.9.1 and newer. The real cause of most post-update issues is an outdated Anima build, a plugin-specific regression, stale block markup that needs recovery, or a conflict triggered by the Gutenberg plugin or another plugin.

Where to look. Your Pixelgrade LT dashboard is powered by Pixelgrade Assistant, under Appearance → Pixelgrade Design. That's where theme updates are surfaced for you; plugin updates appear on the regular Plugins screen.

Current Pixelgrade LT baseline

Confirm your site matches the current supported WordPress, PHP, and plugin versions before anything else. The Pixelgrade LT Requirements article is the source of truth.

If your site is running a much older LT setup than those versions, update Anima and its required plugins first. Many post-update issues come from running a new WordPress core version on top of older Pixelgrade LT components.

Checking the setup before considering a rollback

Capture a quick snapshot of your environment so you can tell which component is actually misbehaving. Work through this list first.

1. Confirm that Anima is the active theme and note its version (Appearance → Themes).
2. Check whether that Anima build is the latest available. Anima is the block theme behind every Pixelgrade LT site, and an outdated Anima is one of the most common causes of post-update issues.
3. Confirm the versions of Pixelgrade Assistant, Nova Blocks, and Style Manager (Plugins screen in your dashboard).
4. Check whether the Gutenberg plugin is installed and active.
5. Identify whether the issue affects the frontend only, the editor only, or both.

The fix depends on the symptom. A site showing raw HTML separators after a Nova Blocks update is a different problem from a page showing an Attempt recovery warning inside the editor.

Troubleshooting by symptom

Match the exact symptom to one of the scenarios below, then follow the steps for that scenario.

Recovering from "This block contains unexpected or invalid content"

This warning usually means the block markup on the page is older than the current block definition, or that a theme or plugin update changed the block.

1. Open the affected page in the editor.
2. Click Attempt recovery on the affected block.
3. Save the page.
4. Repeat for any other affected blocks on that page.

If the issue disappears after recovery, you do not need to roll back WordPress. If the problem keeps coming back across multiple pages, continue with the checks below — you may be dealing with an outdated plugin or a broader compatibility issue.

Fixing "This block has encountered an error and cannot be previewed"

If blocks stop previewing or become uneditable, the cause is almost always the Gutenberg plugin or an outdated Pixelgrade LT component rather than the page content itself.

1. Deactivate the Gutenberg plugin if it is active.
2. Update Anima, Pixelgrade Assistant, and Nova Blocks to their latest available versions. (Theme updates are surfaced for you in Appearance → Pixelgrade Design, and plugin updates appear on the regular Plugins screen.)
3. Test the same block on a fresh page.
4. Temporarily deactivate non-essential plugins and test again.

If the block fails even on a fresh page, it is likely a plugin conflict, an outdated Pixelgrade LT component, or a known regression.

Handling a frontend that broke right after updating a plugin

If the problem appeared immediately after updating a plugin, check whether the symptoms match a known regression before touching WordPress core.

• Style Manager: site crash, fatal error, white screen, or inaccessible wp-admin.
• Nova Blocks: strange separators, raw HTML, or span tags showing on the frontend.

Start by identifying the exact plugin and version that changed, then work through the steps below.

1. Reinstall the affected plugin if needed.
2. Clear all caching layers.
3. Hard refresh the browser.
4. Re-test before changing WordPress core.

Diagnosing an editor that works but a frontend that looks wrong

When the editor looks fine but the frontend is broken, the issue is almost always one of these:

• Stale cache.
• A frontend-only plugin regression.
• A markup mismatch in custom HTML or in third-party form or plugin output.
• A theme or plugin interaction specific to that block or page.

Start by clearing your caching layers and confirming whether the issue still reproduces in a private browser window.

Deciding when a rollback is actually appropriate

Rollback is not the first step for Pixelgrade LT sites. Consider it only when one of these is true:

• Your site is on an older Anima version and cannot be updated yet.
• A confirmed regression affects your current setup and no patched version is available yet.
• Support explicitly confirms that your exact installed combination needs a temporary rollback.

When a rollback is necessary, change as little as possible and only after noting your current versions.

1. Back up the website.
2. Confirm the exact component that likely caused the issue.
3. Roll back only that component first if possible.
4. Re-test before changing anything else.

Rolling back WordPress core without checking your plugin and Pixelgrade LT component versions first usually creates extra work and can hide the real cause.

Related guides

Follow up with these guides if you need more detail on a specific block error.

• Unexpected or Invalid Content Block Error.
• How to get past the "This block has encountered an error and cannot be previewed" error.