Error on Donate button

Hello again: When I tested the campaign I set up, I got the following error when I tried the “donate” button. I was using the PayPal option. Any suggestions would be appreciated.
Thank you, Sophia

Warning: mysql_real_escape_string() expects parameter 1 to be string, object given in /home/tdhsdev/public_html/wp-includes/wp-db.php on line 1129

Warning: Cannot modify header information – headers already sent by (output started at /home/tdhsdev/public_html/wp-includes/wp-db.php:1129) in /home/tdhsdev/public_html/wp-includes/pluggable.php on line 1228

https://ww.wp.xz.cn/plugins/charitable/