Title: 500 error message
Last modified: April 4, 2019

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# 500 error message

 *  [Dustin Zurek](https://wordpress.org/support/users/dustin-zurek/)
 * (@dustin-zurek)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/500-error-message-2/)
 * Dear Team,
 * By using your plugin I get this error information.
    I cant create any invoice
   and preview. I used this plugin before and everything was ok. I tried also to
   uninstall the plugin and to configure everything from base. Please help !
 * **Error Message:** Uncaught Error: Call to undefined function Dompdf\mb_internal_encoding()
   in /home/dasenseo/public_html/sportsense.de/wp-content/plugins/woo-pdf-invoice-
   builder/vendor/dompdf/dompdf/src/Dompdf.php:275 Stack trace: #0 /home/dasenseo/
   public_html/sportsense.de/wp-content/plugins/woo-pdf-invoice-builder/PDFGenerator.
   php(283): Dompdf\Dompdf->__construct() #1 /home/dasenseo/public_html/sportsense.
   de/wp-content/plugins/woo-pdf-invoice-builder/PDFGenerator.php(277): RednaoPDFGenerator-
   >Generate(false) #2 /home/dasenseo/public_html/sportsense.de/wp-content/plugins/
   woo-pdf-invoice-builder/woocommerce-pdf-invoice-ajax.php(510): RednaoPDFGenerator-
   >GeneratePreview() #3 /home/dasenseo/public_html/sportsense.de/wp-includes/class-
   wp-hook.php(286): RednaoWooCommercePDFInvoiceAjax->DiagnoseError(”) #4 /home/
   dasenseo/public_html/sportsense.de/wp-includes/class-wp-hook.php(310): WP_Hook-
   >apply_filters(”, Array) #5 /home/dasenseo/public_html/sportsense.de/wp-includes/
   plugin.php(465): WP_Hook->do_action(Array) #6 /home/dasenseo/
 * **Error File:** /home/dasenseo/public_html/sportsense.de/wp-content/plugins/woo-
   pdf-invoice-builder/vendor/dompdf/dompdf/src/Dompdf.php
 * **Error Line:** 275
 * ![](https://i0.wp.com/sportsense.de/wp-content/uploads/2019/04/Dompdf.png?ssl
   =1)
 * Best regards
    Dustin
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2F500-error-message-2%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

The topic ‘500 error message’ is closed to new replies.

 * ![](https://ps.w.org/woo-pdf-invoice-builder/assets/icon-256x256.gif?rev=3517675)
 * [PDF Builder for WooCommerce. Create invoices,packing slips and more](https://wordpress.org/plugins/woo-pdf-invoice-builder/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woo-pdf-invoice-builder/#faq)
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 * 0 replies
 * 1 participant
 * Last reply from: [Dustin Zurek](https://wordpress.org/support/users/dustin-zurek/)
 * Last activity: [7 years, 2 months ago](https://wordpress.org/support/topic/500-error-message-2/)
 * Status: not resolved