After update I can’t log in in wordpress

Hi,

I updated your plugin, after that i log out from wordpress and it shows me this error..

Warning: Cannot modify header information – headers already sent by (output started at /data/web/virtuals/119642/virtual/www/wp-content/plugins/easy-appointments/src/fields/tablecolumns.php:2) in /data/web/virtuals/119642/virtual/www/wp-login.php on line 390

Warning: Cannot modify header information – headers already sent by (output started at /data/web/virtuals/119642/virtual/www/wp-content/plugins/easy-appointments/src/fields/tablecolumns.php:2) in /data/web/virtuals/119642/virtual/www/wp-includes/pluggable.php on line 898

and i can’t log in to wordpress.

Can you help me, please?

P.S.: Sorry for my english, I am not a native speaker.