Hi. I’ve just updated the Birthdays plugin. It said the update was successful, but did give me the following error (on the updates page):

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘sp_birthdays_upgrade_check’ not found or invalid function name in /problem-with-post-edit-buttonome/bbfuture/public_html/wp/wp-includes/plugin.php on line 496

Is this anything to be concerned about?

Edit: Sorry, I should have posted this in the plugins section. Feel free to move it.