Fatal error: Uncaught Error: Using $this when not in object context in /var/www/erp/spreadsheet/vendor/mpdf/mpdf/config_fonts-distr-without-OTL.php:16 Stack trace: #0 {main} thrown in /var/www/erp/spreadsheet/vendor/mpdf/mpdf/config_fonts-distr-without-OTL.php on line 16