diff -ruN lib/plugins/dw2pdf.old/vendor/mpdf/mpdf/src/Config/ConfigVariables.php lib/plugins/dw2pdf/vendor/mpdf/mpdf/src/Config/ConfigVariables.php
--- lib/plugins/dw2pdf.old/vendor/mpdf/mpdf/src/Config/ConfigVariables.php	2021-10-05 17:24:40.914758223 +0200
+++ lib/plugins/dw2pdf/vendor/mpdf/mpdf/src/Config/ConfigVariables.php	2021-10-05 17:25:34.471666510 +0200
@@ -453,7 +453,7 @@
 				__DIR__ . '/../../ttfonts'
 			],
 
-			'tempDir' => __DIR__ . '/../../tmp',
+			'tempDir' => '/var/lib/dokuwiki/data/tmp',
 
 			'allowAnnotationFiles' => false,