ticket system Argument 7 passed to processPoppedTicket() must be an instance of WHMCS\Mail\AutoSubmittedHeader

[WisTex]

I have it set up so that it imports emails into the ticket system. The cron is set up, and the cron does run, but the Support Ticket Mail Import Log shows the following error for every email:

Argument 7 passed to processPoppedTicket() must be an instance of WHMCS\Mail\AutoSubmittedHeader, array given, called in /home/username/whmcsdata/crons/pop.php on line 0

WHMCS 8.8.0
cPanel 110.0 (Build 12)

Edited October 11, 2023 by WisTex
Corrected WHMCS version