[Plugin: Event Registration] Excel export issue

Hi,

Having a problem exporting attendees to an excel file, here is the error I get:

Deprecated: Assigning the return value of new by reference is deprecated in /home/towards/public_html/wp-settings.php on line 219

Deprecated: Assigning the return value of new by reference is deprecated in /home/towards/public_html/wp-settings.php on line 234

Deprecated: Assigning the return value of new by reference is deprecated in /home/towards/public_html/wp-settings.php on line 241

Deprecated: Assigning the return value of new by reference is deprecated in /home/towards/public_html/wp-settings.php on line 248

Deprecated: Assigning the return value of new by reference is deprecated in /home/towards/public_html/wp-settings.php on line 273

Deprecated: Function set_magic_quotes_runtime() is deprecated in /home/towards/public_html/wp-settings.php on line 27

Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /home/towards/public_html/wp-settings.php:219) in /home/towards/public_html/wp-content/plugins/event-registration/er_sample_page.php on line 7

Warning: Cannot modify header information – headers already sent by (output started at /home/towards/public_html/wp-settings.php:219) in /home/towards/public_html/wp-content/plugins/event-registration/event_registration_export.php on line 56

Warning: Cannot modify header information – headers already sent by (output started at /home/towards/public_html/wp-settings.php:219) in /home/towards/public_html/wp-content/plugins/event-registration/event_registration_export.php on line 57

Warning: Cannot modify header information – headers already sent by (output started at /home/towards/public_html/wp-settings.php:219) in /home/towards/public_html/wp-content/plugins/event-registration/event_registration_export.php on line 58

Warning: Cannot modify header information – headers already sent by (output started at /home/towards/public_html/wp-settings.php:219) in /home/towards/public_html/wp-content/plugins/event-registration/event_registration_export.php on line 59

https://www.ads-software.com/extend/plugins/event-registration/