Gantry

@mikelimit9999

We’re not seeing this issue in our test environment, Can you check the following:

1. What PHP version are you using? Gantry 5.5.22 works best with PHP 7.4–8.2.
2. Are the /templates/, /cache/, and /logs/ folders writable by the server?
3. Have any theme files (like layout.yaml or particle YAML files) been edited recently? (you can download the latest theme Helium or hydrogen from https://gantry.org/downloads
4. When you try to save an Atom, can you open the browser’s developer tools (F12), go to the Network tab, and let us know if any request shows an error?
5. If possible, enable debug mode or error reporting so we can see exactly where the issue is coming from.

Let us know what you find and we’ll try to help.

@justin-dixon thanks for the update and the extra details. Glad it worked out.

@justin-dixon thanks for your details. Its very helpful. IM going to try to do a few things here to hopefully help and to clarify moving forward.

1. As you know rockettheme closed up shop and are not supporting their themes. They have been gracious in providing us full access to continue Gantry (which we are) and the two default themes that come with it. Helium and Hydrogen
2. Unfortunately for users of rockettheme themes we cannot support those since we did not or will not receive any of those memberships. We are moving forward in fully supporting and building Gantry but not past Rocket themes. You can see more details here: tiger12.com/gantry
3. With that said if you fill out the form below on the prior url I sent we do have a full team that can help debug and solve you specific issues. I know not ideal but its a path.
4. With that said here is more specifics on your issue and hopefully it will help you resolve them. We are full committed to Gantry are building a great future with it.

since we’ve taken over Gantry, we’ve updated the plugin to require PHP 8.1 or higher and we’re actively supporting only two templates (Helium and Hydrogen). These have been fully tested and modernized for compatibility going forward.

If you’re using one of the older RocketTheme templates (like Callisto, Remnant, etc.), you might run into issues—including fatal errors like this one:

Error thrown with message "Class 'Leafo\ScssPhp\Type' not found"

What’s happening because those templates still rely on an old SCSS compiler (Leafo\ScssPhp), which isn’t compatible with PHP 8.1+. We’ve removed that old dependency and replaced it with a modern, maintained one (scssphp/scssphp), which works fine with updated templates.

We’re not maintaining those older templates, so they may break unless manually updated. If you really need to keep using one of them, a developer would need to go through and update the SCSS-related parts to use ScssPhp\ScssPhp instead of Leafo\ScssPhp. Otherwise, your best bet is switching to one of the supported templates.

Step-by-Step: Update from Leafo\ScssPhp to ScssPhp\ScssPhp

1. Install the new SCSS compiler (if not already included)

composer require scssphp/scssphp

2. Replace the old use statement in PHP files

Old (incompatible)

use Leafo\ScssPhp\Compiler;

New (compatible)

use ScssPhp\ScssPhp\Compiler;

3. Update any class instantiations

Old

$scss = new \Leafo\ScssPhp\Compiler();

✅ New

$scss = new \ScssPhp\ScssPhp\Compiler();

4. Update deprecated method calls if necessary

Most method names are the same between the old and new compiler, but here’s one example of a potential difference: Check for this:

$scss->setFormatter('Leafo\ScssPhp\Formatter\Compressed'); And replace with:

use ScssPhp\ScssPhp\Formatter\Compressed; $scss->setFormatter(Compressed::class);

Or just:

$scss->setFormatter(\ScssPhp\ScssPhp\Formatter\Compressed::class);

5. Verify Template Structure

Legacy RocketTheme templates often do SCSS compilation dynamically in PHP. Look for code in:

• functions.php
• /src/ or /includes/
• Any Compiler.php or ScssCompiler.php files

✅ Example Updated Code Block

Here’s a fully updated SCSS compile example using scssphp/scssphp:

use ScssPhp\ScssPhp\Compiler; use ScssPhp\ScssPhp\Formatter\Compressed; $scss = new Compiler(); $scss->setFormatter(Compressed::class); $scss->setImportPaths(__DIR__ . '/scss/'); $compiled = $scss->compileString(file_get_contents(__DIR__ . '/scss/style.scss')); file_put_contents(__DIR__ . '/css/style.css', $compiled->getCss()); 🧼 Bonus Tip: Remove old vendor packages

If you had leafo/scssphp installed, remove it:

composer remove leafo/scssphp

HI @jasonmac_75 Ive never seen that done before where there is a warning to disable auto updates from a specific plugin but good to know. We did add a warning for php upgrade to 8.1 this morning to help with this.

@andreascarfo yes if you were set to automatic updates and your php was lower that 8.1 you would have this problem. Gantry has not been updated since the last 2 releases and now we are current with WP. Just do the following:

1. Upgrade to php 8.1 (if you are not able then rollback your Gantry version)
2. If you are using the Helium or Hydrogen theme download them here: https://gantry.org/downloads and update you parent theme.

Rockettheme closed up shop a month ago and we have taken over the development of Gantry. If you need additional help please go to: tiger12.com/gantry

Hi,

Sorry for late reply. We’re using latest version of Twig in Gantry5 as it’s the only one which supports PHP 7.4 so maybe there’s a conflict between newest Twig version in G5 and older version in the mentioned Data Tables Generator plugin?

Please try to update that plugin to the newest version or ask the developer of it if he can update the Twig inside of his plugin.

Let me know if that fixed the issue.

Thanks!

Great!

Hi,

The issue is that your whole site is being loaded via the https:// and the owlcarousel.min.js via the http:// – this is called mix content. Browsers block sometimes this type of content for the security reasons.

Can you please tell me which version of Gantry5 and Helium theme are you using?

Also can you please paste me the <script> tag found right after {% do gantry.load('jquery') %} in the wp-content/themes/g5_helium/particles/owlcarousel.html.twig?

Thanks!