LT Theme Compatibility and Post-Update Troubleshooting

If you found older Pixelgrade LT articles mentioning that these themes only work up to WordPress 6.2.2, please ignore that guidance. It is outdated.

Our LT themes work with WordPress 6.9.1 and newer. In most cases, if your site starts behaving strangely after an update, the issue is not that LT themes are limited to an old WordPress release. The real cause is usually one of these: an outdated Anima build, a plugin-specific regression, stale block markup that needs recovery, or a conflict caused by the Gutenberg plugin or another plugin.

Current LT baseline

For the current supported WordPress, PHP, and required plugin versions, use Theme Requirements as the source of truth.

If your site is still running a much older LT setup than the versions listed there, update the theme and the required plugins first. Many post-update issues come from running new WordPress core versions on top of older LT components.

What to check before rollback

Please check these items first:

1. Confirm which LT theme is active and note its version.
2. Confirm the Anima version.
3. Confirm the versions of Pixelgrade Care, Nova Blocks, and Style Manager.
4. Check whether the Gutenberg plugin is installed and active.
5. Identify whether the issue affects the frontend only, the editor only, or both.

This matters because the fix depends on the symptom. For example, a site that shows raw HTML separators after a Nova Blocks update is a different problem from a page that shows an Attempt recovery warning in the editor.

Troubleshoot by symptom

“This block contains unexpected or invalid content”

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

1. Open the affected page in the editor.
2. Click the Attempt recovery button 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the problem keeps coming back across multiple pages, continue with the checks below because you may be dealing with an outdated plugin or a broader compatibility issue.

“This block has encountered an error and cannot be previewed”

If blocks stop previewing or become uneditable:

1. Deactivate the Gutenberg plugin if it is active.
2. Update the LT theme, Pixelgrade Care, and Nova Blocks to their latest available versions.
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, the problem is usually not the page content itself. It is more likely a plugin conflict, an outdated LT component, or a known regression.

The frontend broke right after updating a plugin

If the problem appeared immediately after updating a plugin, check whether the symptoms match a known regression:

• 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

In this case, do not assume WordPress core is the cause. Start by identifying the exact plugin and version that changed.

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

The editor works, but the frontend looks wrong

If the editor looks fine but the frontend is broken, the issue is usually one of these:

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

Start by clearing cache and confirming whether the issue is reproducible in a private browser window.

When rollback is actually appropriate

Rollback is not the first step for LT themes. Consider rollback only if one of these is true:

• your LT theme 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

If 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 plugins and LT component versions first usually creates extra work and can hide the real cause.

Related guides

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