Cpdf.php / DejaVuSans related errors when upgrading from PHP 7.1 to 8.0 (IIS 10 dompdf 1.0.2)

I'm getting the following errors when upgrading from PHP 7.1 to 8.0,
Most seem related to Cpdf.php or DejaVuSans.

[24-Feb-2021 17:35:11 America/Los_Angeles] PHP Warning:  touch(): Utime failed: No such file or directory in C:\inetpub\wwwroot\era\docs\utilities\dompdf_1-0-2\dompdf\lib\Cpdf.php on line 1176
[24-Feb-2021 17:35:11 America/Los_Angeles] PHP Fatal error:  Uncaught FontLib\Exception\FontNotFoundException: Font not found in: C:\WINDOWS\TEMP/DejaVuSans-Bold.ttf.tmp.6036fecf80f9f in C:\inetpub\wwwroot\era\docs\utilities\dompdf_1-0-2\dompdf\lib\php-font-lib\src\FontLib\Font.php:28
Stack trace:
#0 C:\inetpub\wwwroot\era\docs\utilities\dompdf_1-0-2\dompdf\lib\Cpdf.php(1182): FontLib\Font::load()
#1 C:\inetpub\wwwroot\era\docs\utilities\dompdf_1-0-2\dompdf\lib\Cpdf.php(931): Dompdf\Cpdf->processFont()
#2 C:\inetpub\wwwroot\era\docs\utilities\dompdf_1-0-2\dompdf\lib\Cpdf.php(3195): Dompdf\Cpdf->o_font()
#3 C:\inetpub\wwwroot\era\docs\utilities\dompdf_1-0-2\dompdf\src\Adapter\CPDF.php(1217): Dompdf\Cpdf->output()
#4 C:\inetpub\wwwroot\era\docs\utilities\dompdf_1-0-2\dompdf\src\Dompdf.php(955): Dompdf\Adapter\CPDF->output()
#5 C:\inetpub\wwwroot\era\class_generatePDF.php(56): Dompdf\Dompdf->output()
#6 C:\inetpub\wwwroot\era\docs\pdf_packet.php(143): generatePDF->generatePDF()
#7 {main}
  thrown in C:\inetpub\wwwroot\era\docs\utilities\dompdf_1-0-2\dompdf\lib\php-font-lib\src\FontLib\Font.php on line 28

Start by reproducing the reported PHP 7.1-to-8.0 failure on IIS 10, then inspect lib/Cpdf.php around lines 1176 and 1182 and lib/php-font-lib/src/FontLib/Font.php:28. Determine why the temporary DejaVuSans-Bold.ttf file is unavailable and verify that PDF generation completes without the reported warning or exception.