Error in mails

Hello,

The issue is that in the mails that are sent to the costumers (and the copy the admin gets) present the following error:

Warning: compact(): Undefined variable $updated in /home/lunatmsj/public_html/wp-content/plugins/salon-booking-system/views/mail/summary.php on line 67

Warning: compact(): Undefined variable $rescheduled in /home/lunatmsj/public_html/wp-content/plugins/salon-booking-system/views/mail/summary.php on line 67

Warning: Undefined array key 0 in /home/lunatmsj/public_html/wp-content/plugins/salon-booking-system/views/mail/template.php on line 133

Warning: Undefined array key 1 in /home/lunatmsj/public_html/wp-content/plugins/salon-booking-system/views/mail/template.php on line 133

Warning: Undefined array key 2 in /home/lunatmsj/public_html/wp-content/plugins/salon-booking-system/views/mail/template.php on line 133

Warning: Undefined array key 3 in /home/lunatmsj/public_html/wp-content/plugins/salon-booking-system/views/mail/template.php on line 133

Warning: Undefined array key 4 in /home/lunatmsj/public_html/wp-content/plugins/salon-booking-system/views/mail/template.php on line 133

Warning: Undefined array key 5 in /home/lunatmsj/public_html/wp-content/plugins/salon-booking-system/views/mail/template.php on line 133

Warning: compact(): Undefined variable $updated_message in /home/lunatmsj/public_html/wp-content/plugins/salon-booking-system/views/mail/template.php on line 201

Warning: compact(): Undefined variable $customer in /home/lunatmsj/public_html/wp-content/plugins/salon-booking-system/views/mail/template.php on line 201

Warning: compact(): Undefined variable $updated in /home/lunatmsj/public_html/wp-content/plugins/salon-booking-system/views/mail/template.php on line 201

It only happens when the mail is for: Appointment update, manually set appointment (form the backend), date change.

when the date is set from the front end, nothing happens.

Thanks

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