getgrav/grav · error · InvalidArgumentException

Invalid argument $key.

Error message

Invalid argument $key.

What it means

Error "Invalid argument $key." thrown in getgrav/grav.

Source

Thrown at system/src/Grav/Common/Page/Collection.php:230

        return $list;
    }

    /**
     * Remove item from the list.
     *
     * @param PageInterface|string|null $key
     * @return $this
     * @throws InvalidArgumentException
     */
    public function remove($key = null)
    {
        if ($key instanceof PageInterface) {
            $key = $key->path();
        } elseif (null === $key) {
            $key = (string)key($this->items);
        }
        if (!is_string($key)) {
            throw new InvalidArgumentException('Invalid argument $key.');
        }

        parent::remove($key);

        return $this;
    }

    /**
     * Reorder collection.
     *
     * @param string $by
     * @param string $dir
     * @param array|null  $manual
     * @param string|null $sort_flags
     * @return $this
     */
    public function order($by, $dir = 'asc', $manual = null, $sort_flags = null)
    {

View on GitHub (pinned to 6040efed04)

When it happens

Trigger: Thrown at system/src/Grav/Common/Page/Collection.php:230 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of getgrav/grav@6040efed04 (2026-08-17). Data as JSON: /api/errors/b092ea227413a475. Report an issue: GitHub.