Fatal error:  Attribute "AllowDynamicProperties" cannot target function (allowed targets: class) 
in /var/www/ip/application/modules/mailer/helpers/phpmailer_helper.php on line 16, 
referer: http://localhost/ip/index.php/mailer/invoice/3

Stack trace:, referer: http://localhost/ip/index.php/mailer/invoice/3
  1. {main}() /var/www/ip/index.php:0, referer: http://localhost/ip/index.php/mailer/invoice/3
  2. require_once() /var/www/ip/index.php:329, referer: http://localhost/ip/index.php/mailer/invoice/3
  3. Mailer->send_invoice($invoice_id = '3') /var/www/ip/vendor/codeigniter/framework/system/core/CodeIgniter.php:533, referer: http://localhost/ip/index.php/mailer/invoice/3
  4. email_invoice($invoice_id = '3', $invoice_template = 'InvoicePlane', $from = [0 => 'my@mail.com', 1 => 'me'], $to = 'addresse@email.dev', $subject = 'Facture #3', $body = 'yep {{{client_surname}}}{{{client_name}}}<br />\\r\\nsending by {{{user_company}}} ({{{user_name}}})<br />\\r\\ninvoice number {{{invoice_number}}} ({{{invoice_status}}})', $cc = '', $bcc = '', $attachments = []) /var/www/ip/application/modules/mailer/controllers/Mailer.php:165, referer: http://localhost/ip/index.php/mailer/invoice/3
  5. MX_Loader->helper($helper = 'mailer/phpmailer') /var/www/ip/application/helpers/mailer_helper.php:58, referer: http://localhost/ip/index.php/mailer/invoice/3
  6. Modules::load_file($file = 'phpmailer_helper', $path = '/var/www/ip/application/modules/mailer/helpers/', $type = *uninitialized*, $result = *uninitialized*) /var/www/ip/application/third_party/MX/Loader.php:347, referer: http://localhost/ip/index.php/mailer/invoice/3