Uncaught TypeError

  • Resolved rverdons

    (@rverdons)


    4 years, 7 months ago

    Hi

    I just updated to:
    WP-Mail-SMTP 3.0.3
    Wordpress 5.8
    PHP 8.0

    Now I get this error:

    Fatal error: Uncaught TypeError: WPMailSMTP\Providers\MailerAbstract::__construct(): Argument #1 ($phpmailer) must be of type WPMailSMTP\MailCatcherInterface, PHPMailer\PHPMailer\PHPMailer given, called in /www/wp-content/plugins/wp-mail-smtp/src/Providers/Gmail/Mailer.php on line 47 and defined in /www/wp-content/plugins/wp-mail-smtp/src/Providers/MailerAbstract.php:104
    Stack trace:
    #0 /www/wp-content/plugins/wp-mail-smtp/src/Providers/Gmail/Mailer.php(47): WPMailSMTP\Providers\MailerAbstract->__construct(Object(PHPMailer\PHPMailer\PHPMailer))
    #1 /www/wp-content/plugins/wp-mail-smtp/src/Providers/Loader.php(195): WPMailSMTP\Providers\Gmail\Mailer->__construct(Object(PHPMailer\PHPMailer\PHPMailer))
    #2 /www/wp-content/plugins/wp-mail-smtp/src/Providers/Loader.php(151): WPMailSMTP\Providers\Loader->get_entity(‘gmail’, ‘Mailer’)
    #3 /www/wp-content/plugins/wp-mail-smtp/src/Admin/Review.php(106): WPMailSMTP\Providers\Loader->get_mailer(‘gmail’, Object(PHPMailer\PHPMailer\PHPMailer))
    #4 /www/wp-content/plugins/wp-mail-smtp/src/Admin/Review.php(78): WPMailSMTP\Admin\Review->review()
    #5 /www/wp-includes/class-wp-hook.php(303): WPMailSMTP\Admin\Review->review_request(”)
    #6 /www/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array)
    #7 /www/wp-includes/plugin.php(470): WP_Hook->do_action(Array)
    #8 /www/wp-admin/admin-header.php(287): do_action(‘admin_notices’)
    #9 /www/wp-admin/plugins.php(603): require_once(‘/www/wp-admin/a…’)
    #10 {main} thrown in /www/wp-content/plugins/wp-mail-smtp/src/Providers/MailerAbstract.php on line 104

    I disabled my plugins 1 by 1 and the error dissapears when I disable WP Mail SMTP.

    Can you help me with this?

Viewing 5 replies - 1 through 5 (of 5 total)
  • Plugin Author Gregor Capuder

    (@capuderg)

    4 years, 7 months ago

    Hi @rverdons,

    did you also update any other parts of your WP site? For example the WordPress core version? Also, which version of our plugin did you use before?

    It looks like the global WordPress core $phpmailer variable is being overwritten by another plugin or theme.

    We are expecting to get our MailCatcherV6 object instance in the WPMailSMTP\Providers\MailerAbstract::__construct() method, and something else is overwriting it and providing the PHPMailer\PHPMailer\PHPMailer object instead.

    Please check any Must-Use plugins on your WP site and/or any custom code in wp-config.php file. Hosting companies usually make some overwrites, to improve or prevent the email sending via the PHPMailer class…

    You already said you disabled your plugins one by one… Could you also please disable all plugins except our WP Mail SMTP? And see if this error still occurs?

    If it does not, then some other plugin is causing this issue (maybe one that is also sending emails?).

    Let me know how it goes.

    Take care!

    PS: I tested our plugin (v3.0.3 with the Gmail mailer) on PHP 8, on WP 5.8 and didn’t experience this issue.

    Thread Starter rverdons

    (@rverdons)

    4 years, 7 months ago

    Hi Gregor,
    Thanks for your fast response!

    I also update all other plugins and my theme. I am not sure about the core version: I just updated Worpress. Is the core something separate?

    I did the check you suggested: disable all plugins except WP Mail SMTP: still the same error.

    I found a piece of code in my wp-config.php related to phpmailer. It is placed there by my hosting company (Transip). To me it doesn’t seem to replace the PHPMailer class, it just changes a setting, right? 

    /** TransIP fix: sendmail does not support flags. This fix is needed in order to make mailing work. */
global $phpmailer;
if ((!is_object( $phpmailer ) || !is_a( $phpmailer, 'PHPMailer' )) &&
     file_exists(ABSPATH . '/wp-includes/class-phpmailer.php') &&
     file_exists(ABSPATH . '/wp-includes/class-smtp.php')) {
	require_once ABSPATH . '/wp-includes/class-phpmailer.php';
	require_once ABSPATH . '/wp-includes/class-smtp.php';
	$phpmailer = new PHPMailer( true );
}
$phpmailer->UseSendmailOptions = false;
    Plugin Author Gregor Capuder

    (@capuderg)

    4 years, 7 months ago

    Hi @rverdons,

    what happens, if you try to remove this block of code and save the file? Is the issue still present?

    By WordPress Core I mean WordPress. So you are all good.

    Did you also check the mu-plugins must-use plugins folder (if it exists)? And also try to switch to another theme, maybe the theme also has some custom mailing code in it.

    Let me know how it goes.

    Take care!

    Thread Starter rverdons

    (@rverdons)

    4 years, 7 months ago

    Hi

    I tried another theme (a default WP theme): doesn’t solve the issue.
    The mu-plugins folder is empty.

    I just disabled that piece of phpmailer code in my wp-config.php: That makes the issue go away!

    So for me this issue is solved now. I’ll work with my hosting provider to see if there can be any side effects of disabling the code. Thanks for your help!

    Robert

    Plugin Author Gregor Capuder

    (@capuderg)

    4 years, 7 months ago

    Hi Robert,

    thanks for letting us know. I don’t think removing this code will have any side effects, because you are using our plugin to send emails.

    Have a nice day!

Viewing 5 replies - 1 through 5 (of 5 total)

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