filp/whoops · error · InvalidArgumentException

'$path' is not a valid directory

Error message

'$path' is not a valid directory

What it means

Error "'$path' is not a valid directory" thrown in filp/whoops.

Source

Thrown at src/Whoops/Handler/PrettyPageHandler.php:638

     */
    public function getPageTitle()
    {
        return $this->pageTitle;
    }

    /**
     * Adds a path to the list of paths to be searched for resources.
     *
     * @param string $path
     *
     * @throws InvalidArgumentException If $path is not a valid directory
     *
     * @return static
     */
    public function addResourcePath($path)
    {
        if (!is_dir($path)) {
            throw new InvalidArgumentException(
                "'$path' is not a valid directory"
            );
        }

        array_unshift($this->searchPaths, $path);
        return $this;
    }

    /**
     * Adds a custom css file to be loaded.
     *
     * @param string|null $name
     *
     * @return static
     */
    public function addCustomCss($name)
    {
        $this->customCss = $name;

View on GitHub (pinned to fa1bc9c95a)

When it happens

Trigger: Thrown at src/Whoops/Handler/PrettyPageHandler.php:638 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of filp/whoops@fa1bc9c95a (2026-08-21). Data as JSON: /api/errors/96dce820badbf425. Report an issue: GitHub.