errors -php.

Please help, I’m getting all these warnings!
http://www.writeforthecure.com

Warning: session_start(): open(/tmp/sess_3b5ca6c3460b1c18d06702550666fa31, O_RDWR) failed: Permission denied (13) in /home/write4cure/public_html/wp-content/plugins/buddypress-media/index.php on line 61
Warning: session_start(): Cannot send session cache limiter – headers already sent (output started at /home/write4cure/public_html/wp-content/plugins/buddypress-media/index.php:61) in/home/write4cure/public_html/wp-content/plugins/buddypress-media/index.php on line 61

https://wordpress.org/plugins/buddypress-media/