[10-Jun-2026 23:52:33 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php:57
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php on line 57
[11-Jun-2026 00:42:04 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php:50
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php on line 50
[17-Jun-2026 09:06:38 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php:57
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php on line 57
[19-Jun-2026 05:38:25 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php:57
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php on line 57
[19-Jun-2026 05:43:59 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php:50
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php on line 50
[19-Jun-2026 10:25:48 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php:57
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php on line 57
[19-Jun-2026 10:26:48 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php:50
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php on line 50
[19-Jun-2026 11:18:44 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php:57
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php on line 57
[21-Jun-2026 10:18:08 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php:57
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php on line 57
[21-Jun-2026 10:25:29 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php:57
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php on line 57
[21-Jun-2026 11:32:32 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php:50
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php on line 50
[23-Jun-2026 20:18:41 UTC] PHP Fatal error:  Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php:50
Stack trace:
#0 {main}
  thrown in /home/tracerstudy/public_html/tracerstudy.unmuhjember.ac.id/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php on line 50
