I’m also getting the same message. https:/www.bwhub.com.au
This is the message “Cannot declare class PHPMailer\PHPMailer\PHPMailer, because the name is already in use in /home/customer”
Its at checkout when using Amelia booking system. The booking goes through but it has a error message (shown in chrome) or it just has a red exclamation mark and looks like it wasn’t processed but it the booking is confirmed. Very strange. I have selected system report and all looks fine, other than square not tested with current version of woo commerce