getgrav/grav · error · InvalidArgumentException

The email can be only string or array

Error message

The email can be only string or array

What it means

Error "The email can be only string or array" thrown in getgrav/grav.

Source

Thrown at system/src/Grav/Common/Scheduler/Job.php:652

     * @return mixed
     */
    public function getOutput()
    {
        return $this->output;
    }

    /**
     * Set the emails where the output should be sent to.
     * The Job should be set to write output to a file
     * for this to work.
     *
     * @param  string|array $email
     * @return self
     */
    public function email($email)
    {
        if (!is_string($email) && !is_array($email)) {
            throw new InvalidArgumentException('The email can be only string or array');
        }

        $this->emailTo = is_array($email) ? $email : [$email];
        // Force the job to run in foreground
        $this->inForeground();

        return $this;
    }

    /**
     * Email the output of the job, if any.
     *
     * @return bool
     */
    private function emailOutput()
    {
        if (!count($this->outputTo) || !count($this->emailTo)) {
            return false;

View on GitHub (pinned to 6040efed04)

When it happens

Trigger: Thrown at system/src/Grav/Common/Scheduler/Job.php:652 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/feb7cb46f818c3b8. Report an issue: GitHub.