https://docs.whmcs.com/9-1/tags/pdf-invoices/Recent content in pdf-invoices onHugo -- gohugo.iohttps://docs.whmcs.com/9-1/troubleshooting/troubleshoot-invoices/logout-during-invoice-download/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-1/troubleshooting/troubleshoot-invoices/logout-during-invoice-download/Explains why clicking Download for a PDF invoice logs Client Area users out, caused by pdo_mysql driver behavior in PHP most common on CloudLinux servers, with the fix of switching to the nd_pdo_mysql driver in CloudLinux PHP Configuration or recompiling PHP with the native driver elsewhere.https://docs.whmcs.com/9-1/troubleshooting/troubleshoot-invoices/question-marks-in-pdf-invoices/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-1/troubleshooting/troubleshoot-invoices/question-marks-in-pdf-invoices/Explains that letters rendering as question marks on a PDF quote or invoice stems from the PDF Font Family setting under General Settings > Invoices, and gives the fix of selecting Freesans or installing the dejavusans font if the problem persists.https://docs.whmcs.com/9-1/troubleshooting/troubleshoot-invoices/tcpdf-image-size-errors/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-1/troubleshooting/troubleshoot-invoices/tcpdf-image-size-errors/Covers the TCPDF ERROR: Unable to get the size of the image message caused by the server’s cURL function failing to load the logo, with steps to test via curl -v and fixes involving firewall configuration or editing invoicepdf.tpl to use a relative image path.https://docs.whmcs.com/9-1/troubleshooting/troubleshoot-invoices/tcpdf-timeouts/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-1/troubleshooting/troubleshoot-invoices/tcpdf-timeouts/Covers the Maximum execution time of 300 seconds exceeded error in tcpdf.php caused by a high-resolution logo, with the fix of resizing logo.png or logo.jpg to around 300x100 pixels, noting custom invoicepdf.tpl or quotepdf.tpl templates may reference a different logo path.