Unable to read .php file

@calport
In the log I see:

[Fri Feb 12 14:50:46.952912 2021] [autoindex:error] [pid 632015] [client 192.168.1.1:49617] AH01276: Cannot serve directory /home/website/public_html/: No matching DirectoryIndex (index.php,index.php4,index.php5,index.htm,index.html) found, and server-generated directory index forbidden by Options directive

What to do?