Email won't send with specific URL in body

Using your plugin, if I send an email that contains the following URL, it won’t send.

Please click the link below to generate your tickets.
http://ramonahillsideplayers.org/wp-content/plugins/row-seats-qr-tickets/generate_ticket.php?id=TXYN156

However, if I take out the “w”, it will get sent.

Please click the link below to generate your tickets.
http://ramonahillsideplayers.org/p-content/plugins/row-seats-qr-tickets/generate_ticket.php?id=TXYN156

Any ideas why this is happening? Thanks.

https://wordpress.org/plugins/wp-mail-bank/