Appointment+ Plugin conflict with wordpress

Hello,

I'm using 'appointment+ plugin' and 'beep theme' in my website but i've noted in my website after installed this plugin, wordpress function "the_content()" isn't working properly. It's showing blank pages and after deactivate the plugin website is working fine.

Looking forward for your reply.

Regards,
Raj Chauhan

    Minh

    In my error log file is showing following warnings:

    [30-Mar-2016 09:19:30 UTC] PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'Appointments' does not have a method 'post_ceontent' in /home/australiandiamon/public_html/wp-includes/plugin.php on line 213
    [30-Mar-2016 09:20:51 UTC] PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'Appointments' does not have a method 'post_ceontent' in /home/australiandiamon/public_html/wp-includes/plugin.php on line 213
    [30-Mar-2016 09:21:27 UTC] PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'Appointments' does not have a method 'post_ceontent' in /home/australiandiamon/public_html/wp-includes/plugin.php on line 213
    [30-Mar-2016 09:24:24 UTC] PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'Appointments' does not have a method 'post_ceontent' in /home/australiandiamon/public_html/wp-includes/plugin.php on line 213
    [30-Mar-2016 09:29:23 UTC] PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'Appointments' does not have a method 'post_ceontent' in /home/australiandiamon/public_html/wp-includes/plugin.php on line 213