Title: E_ERROR in Dompdf.php Last modified: November 5, 2023 --- # E_ERROR in Dompdf.php * Resolved [rayman68](https://wordpress.org/support/users/rayman68/) * (@rayman68) * [2 years, 6 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/) * > Hello, > after upgrading this plugin WordPress says a fatal error is caused by this > plugin. Is there a solution for this? > WordPress version 6.1.4 > Actief theme: Storefront (version 4.1.0)PDF Invoices& > Packing Slips for WooCommerce (version 3.7.1)PHP version 7.4.33 > > Uncaught Error: Object of class stdClass could not be converted to string > > in /home/u15803p11549/domains/[winkelteleuk.nl/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/vendor/dompdf/dompdf/src/Dompdf.php:435](http://winkelteleuk.nl/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/vendor/dompdf/dompdf/src/Dompdf.php:435) > > > > Stack trace:#0 /home/u15803p11549/domains/[winkelteleuk.nl/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/vendor/dompdf/dompdf/src/Dompdf.php(435)](http://winkelteleuk.nl/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/vendor/dompdf/dompdf/src/Dompdf.php(435)): > > mb_convert_encoding(‘ Viewing 12 replies - 1 through 12 (of 12 total) * Plugin Contributor [alexmigf](https://wordpress.org/support/users/alexmigf/) * (@alexmigf) * [2 years, 6 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17177174) * Hi [@rayman68](https://wordpress.org/support/users/rayman68/) * Could you please show us a screenshot of the Status tab system requirements? ** PDF Invoices > Status** * Let us know. * Thread Starter [rayman68](https://wordpress.org/support/users/rayman68/) * (@rayman68) * [2 years, 6 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17189795) * ![](https://i0.wp.com/www.winkelteleuk.nl/wp-content/uploads/2020/05/Schermafbeelding- 2023-11-08-om-16.01.55.png?ssl=1) * as requested * Plugin Contributor [alexmigf](https://wordpress.org/support/users/alexmigf/) * (@alexmigf) * [2 years, 6 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17190735) * Are you using a custom PDF template or do you have any custom code snippet injecting data to the PDF? * Thread Starter [rayman68](https://wordpress.org/support/users/rayman68/) * (@rayman68) * [2 years, 6 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17193676) * No I am not. The preview doesn’t seem to work anymore as well. Just a spinning ball * ![](https://i0.wp.com/www.winkelteleuk.nl/wp-content/uploads/2020/05/screenshot. jpg?ssl=1) * Thread Starter [rayman68](https://wordpress.org/support/users/rayman68/) * (@rayman68) * [2 years, 6 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17193684) * We I go to my order I can still generated the PDF invoice and packing slip * Plugin Contributor [Yordan Soares](https://wordpress.org/support/users/yordansoares/) * (@yordansoares) * [2 years, 6 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17230140) * Hi [@rayman68](https://wordpress.org/support/users/rayman68/), * Could you check the WooCommerce logs to see if there are errors with the `wpo- wcpdf` or `fatal-errors` prefix? If so, please share the logs with us. You’ll find the logs under **WooCommerce > Status > Logs**. * See: [Where to find error logs](https://docs.wpovernight.com/woocommerce-pdf-invoices-packing-slips/where-to-find-debug-logs/). * Thread Starter [rayman68](https://wordpress.org/support/users/rayman68/) * (@rayman68) * [2 years, 6 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17230442) * 2023-11-25T12:25:18+00:00 CRITICAL Uncaught Error: Object of class stdClass could not be converted to string in /home/u15803p11549/domains/winkelteleuk.nl/public_html/ wp-content/plugins/woocommerce-pdf-invoices-packing-slips/vendor/dompdf/dompdf/ src/Dompdf.php:435 Stack trace: #0 /home/u15803p11549/domains/winkelteleuk.nl/ public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/vendor/ dompdf/dompdf/src/Dompdf.php(435): mb_convert_encoding(‘loadHtml(‘ render() #3 /home/u15803p11549/domains/winkelteleuk.nl/public_html/wp-content/ plugins/woo-pdf-invoice-builder/PDFGenerator.php(279): RednaoPDFGenerator->Generate( true) #4 /home/u15803p11549/domains/winkelteleuk.nl/public_html/wp-content/plugins in /home/u15803p11549/domains/winkelteleuk.nl/public_html/wp-content/plugins/ woocommerce-pdf-invoices-packing-slips/vendor/dompdf/dompdf/src/Dompdf.php op de lijn 435 * Plugin Contributor [dwpriv](https://wordpress.org/support/users/dwpriv/) * (@dwpriv) * [2 years, 6 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17237190) * We have released a version 3.7.3 of the plugin. Does this issue persist with that update? * Thread Starter [rayman68](https://wordpress.org/support/users/rayman68/) * (@rayman68) * [2 years, 6 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17238340) * After upgrading still errors: * 2023-11-29T10:19:10+00:00 CRITICAL Uncaught Error: Object of class stdClass could not be converted to string in /home/u15803p11549/domains/winkelteleuk.nl/public_html/ wp-content/plugins/woocommerce-pdf-invoices-packing-slips/vendor/dompdf/dompdf/ src/Dompdf.php:435 Stack trace: #0 /home/u15803p11549/domains/winkelteleuk.nl/ public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/vendor/ dompdf/dompdf/src/Dompdf.php(435): mb_convert_encoding(‘loadHtml(‘ render() #3 /home/u15803p11549/domains/winkelteleuk.nl/public_html/wp-content/ plugins/woo-pdf-invoice-builder/PDFGenerator.php(279): RednaoPDFGenerator->Generate( true) #4 /home/u15803p11549/domains/winkelteleuk.nl/public_html/wp-content/plugins in /home/u15803p11549/domains/winkelteleuk.nl/public_html/wp-content/plugins/ woocommerce-pdf-invoices-packing-slips/vendor/dompdf/dompdf/src/Dompdf.php op de lijn 435 2023-11-29T10:21:56+00:00 CRITICAL Uncaught Error: Object of class stdClass could not be converted to string in /home/u15803p11549/domains/winkelteleuk. nl/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/vendor/ dompdf/dompdf/src/Dompdf.php:435 Stack trace: #0 /home/u15803p11549/domains/winkelteleuk. nl/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/vendor/ dompdf/dompdf/src/Dompdf.php(435): mb_convert_encoding(‘loadHtml(‘ render() #3 /home/u15803p11549/domains/winkelteleuk.nl/public_html/wp-content/ plugins/woo-pdf-invoice-builder/PDFGenerator.php(279): RednaoPDFGenerator->Generate( true) #4 /home/u15803p11549/domains/winkelteleuk.nl/public_html/wp-content/plugins in /home/u15803p11549/domains/winkelteleuk.nl/public_html/wp-content/plugins/ woocommerce-pdf-invoices-packing-slips/vendor/dompdf/dompdf/src/Dompdf.php op de lijn 435 * Plugin Contributor [Yordan Soares](https://wordpress.org/support/users/yordansoares/) * (@yordansoares) * [2 years, 6 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17238440) * Do you have a staging site in which you can perform tests? If so, follow these steps: 1. Temporarily disable all the plugins, except **WooCommerce** and **PDF Invoices& Packing Slips for WooCommerce**. 2. Try opening a PDF invoice to check if it opens correctly. 3. If so, activate 1 of the disabled plugins, and open or reload the PDF invoice again, to check if it still opens correctly. 4. Repeat step 3 with each deactivated plugin, until you find the culprit. * Keep us posted about what you discovered! * Thread Starter [rayman68](https://wordpress.org/support/users/rayman68/) * (@rayman68) * [2 years, 5 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17252213) * After upgrading to wordpress version 6.4.1 this problem was solved. * Plugin Contributor [dwpriv](https://wordpress.org/support/users/dwpriv/) * (@dwpriv) * [2 years, 5 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17260993) * Thanks for the update [@rayman68](https://wordpress.org/support/users/rayman68/). We’ll mark this topic as resolved. * All the best Viewing 12 replies - 1 through 12 (of 12 total) The topic ‘E_ERROR in Dompdf.php’ is closed to new replies. * ![](https://ps.w.org/woocommerce-pdf-invoices-packing-slips/assets/icon-256x256. png?rev=2189942) * [PDF Invoices & Packing Slips for WooCommerce](https://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/) * [Frequently Asked Questions](https://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/#faq) * [Support Threads](https://wordpress.org/support/plugin/woocommerce-pdf-invoices-packing-slips/) * [Active Topics](https://wordpress.org/support/plugin/woocommerce-pdf-invoices-packing-slips/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/woocommerce-pdf-invoices-packing-slips/unresolved/) * [Reviews](https://wordpress.org/support/plugin/woocommerce-pdf-invoices-packing-slips/reviews/) * 12 replies * 4 participants * Last reply from: [dwpriv](https://wordpress.org/support/users/dwpriv/) * Last activity: [2 years, 5 months ago](https://wordpress.org/support/topic/e_error-in-dompdf-php/#post-17260993) * Status: resolved