Unable to load a file

I use FPDF for both the web site and command line to generate PDF files.  Both locations use the
same code and until I updated the O/S version on the server it all worked properly.  Now the command
line processing works as normal but the web site fails with error message "Uncaught Exception: FPDF
error: Could not include font definition file: /usr/fpdf186/font/garamond-pro.php in
/usr/fpdf186/fpdf.php:267".  The script that is included in both the web server and the command line
is:

----relevant part - the script fails at the line marked **-->
$pdf = new PDF();
 $pdf->aliasNbPages();
 $pdf->AddPage('P','Letter');
**---here--> $pdf->AddFont('garamond','','Garamond Pro-Regular.php');
 $pdf->SetFont('garamond','',18);
 $page_width = $pdf->GetPageWidth();
 $page_centre = $page_width/2;
----------

The script file does exist and is where it says:
ls -al /usr/fpdf186/font/garamond-pro.php
-rwxr-xr-x. 1 root root 3738 Jan  2 22:04 /usr/fpdf186/font/garamond-pro.php

Selinux is not involved since the same failure occurs in both "enforcing" and "permissive" modes.

Since the script works in one place and not another I suspect that there is some difference between
php-fpm and php on the command line but I haven't been able to find it yet.  Any ideas where to
look?

Further info:  Rocky 9.5, PHP 8.0.30 

Thanks in advance.