octobercms/october · error · CmsException

cms::lang.theme.active.not_found

Error message

cms::lang.theme.active.not_found

What it means

Error "cms::lang.theme.active.not_found" thrown in octobercms/october.

Source

Thrown at modules/cms/classes/Controller.php:127

     * @var \Cms\Classes\PartialWatcher partialWatcher, used internally.
     */
    protected $partialWatcher;

    /**
     * @var bool pageCycled
     */
    protected $pageCycled = false;

    /**
     * __construct the controller.
     * @param \Cms\Classes\Theme $theme Specifies the CMS theme.
     * If the theme is not specified, the current active theme used.
     */
    public function __construct($theme = null)
    {
        $this->theme = $theme ?: Theme::getActiveTheme();
        if (!$this->theme) {
            throw new CmsException(Lang::get('cms::lang.theme.active.not_found'));
        }

        $this->assetPath = $this->getThemeAssetRelativePath();
        $this->assetUrlPath = $this->getThemeAssetUrl();
        $this->router = new Router($this->theme);
        $this->initTwigEnvironment();

        self::$instance = $this;
    }

    /**
     * run finds and serves the requested page URL.
     * If the page cannot be found, returns the page with the URL /404.
     * If the /404 page doesn't exist, returns the system 404 page.
     * If the parameter is null, the current URL used. If it is not provided then '/' is used.
     * Returns the response to the provided URL.
     *
     * @param string|null $url

View on GitHub (pinned to b608633a7e)

When it happens

Trigger: Thrown at modules/cms/classes/Controller.php:127 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of octobercms/october@b608633a7e (2026-08-21). Data as JSON: /api/errors/145928e959e17c4e. Report an issue: GitHub.