Can’t generate invoice. Fatal error.

Hello,

I’m running Woocommerce PDF Invoices 2.9.10, Woocommerce 3.2.3 and WordPress 4.9.1. All three installs have been stable for weeks. Out of the blue, I hit the following error today while trying to generate an order invoice:

Fatal error: Uncaught MpdfException: Unable to create output file: /public_html/firstdistrictcoffee/wp-content/uploads/woocommerce-pdf-invoices/attachments/2018/2018-00006-2018.pdf in /public_html/firstdistrictcoffee/wp-content/plugins/woocommerce-pdf-invoices/vendor/mpdf/mpdf/mpdf.php:9442 Stack trace: #0 /home/wrakocy/public_html/firstdistrictcoffee/wp-content/plugins/woocommerce-pdf-invoices/includes/abstracts/abstract-document.php(204): mPDF->Output(‘/home/wrakocy/p…’, ‘F’) #1 /home/wrakocy/public_html/firstdistrictcoffee/wp-content/plugins/woocommerce-pdf-invoices/includes/abstracts/abstract-invoice.php(321): BEWPI_Abstract_Document->generate(‘F’) #2 public_html/firstdistrictcoffee/wp-content/plugins/woocommerce-pdf-invoices/includes/woocommerce-pdf-invoices.php(383): BEWPI_Abstract_Invoice->generate() #3 /public_html/firstdistrictcoffee/wp-includes/class-wp-hook.php(286): BE_WooCommerce_PDF_Invoices->admin_pdf_callback(”) #4 /public_html/firstdistr in /public_html/firstdistrictcoffee/wp-content/plugins/woocommerce-pdf-invoices/vendor/mpdf/mpdf/mpdf.php on line 9442

My host checked permissions on the folder in question, and assured me that everything was in order. They suggested contacting the plugin author.

Any thoughts on what might be causing this?

Thanks!