Warning: Cannot modify header information

Hi Henry,

Since the latest update, I am getting the following error messages.

Any idea how to fix that?

Thank you!

Notice: Undefined index: therm_svg_style in /home/scorai5/public_html/wp-content/plugins/donation-thermometer/donation_therm.php on line 131

Warning: Cannot modify header information – headers already sent by (output started at /home/scorai5/public_html/wp-content/plugins/donation-thermometer/donation_therm.php:131) in /home/scorai5/public_html/wp-admin/includes/misc.php on line 1416

Warning: Cannot modify header information – headers already sent by (output started at /home/scorai5/public_html/wp-content/plugins/donation-thermometer/donation_therm.php:131) in /home/scorai5/public_html/wp-includes/functions.php on line 6865

Warning: Cannot modify header information – headers already sent by (output started at /home/scorai5/public_html/wp-content/plugins/donation-thermometer/donation_therm.php:131) in /home/scorai5/public_html/wp-content/themes/Divi/includes/builder/functions.php on line 4536

Warning: Cannot modify header information – headers already sent by (output started at /home/scorai5/public_html/wp-content/plugins/donation-thermometer/donation_therm.php:131) in /home/scorai5/public_html/wp-content/themes/Divi/includes/builder/functions.php on line 4538

Warning: Cannot modify header information – headers already sent by (output started at /home/scorai5/public_html/wp-content/plugins/donation-thermometer/donation_therm.php:131) in /home/scorai5/public_html/wp-content/themes/Divi/includes/builder/functions.php on line 4536

Warning: Cannot modify header information – headers already sent by (output started at /home/scorai5/public_html/wp-content/plugins/donation-thermometer/donation_therm.php:131) in /home/scorai5/public_html/wp-content/themes/Divi/includes/builder/functions.php on line 4538

Warning: Cannot modify header information – headers already sent by (output started at /home/scorai5/public_html/wp-content/plugins/donation-thermometer/donation_therm.php:131) in /home/scorai5/public_html/wp-admin/post.php on line 231

Warning: Cannot modify header information – headers already sent by (output started at /home/scorai5/public_html/wp-content/plugins/donation-thermometer/donation_therm.php:131) in /home/scorai5/public_html/wp-includes/pluggable.php on line 1416

Warning: Cannot modify header information – headers already sent by (output started at /home/scorai5/public_html/wp-content/plugins/donation-thermometer/donation_therm.php:131) in /home/scorai5/public_html/wp-includes/pluggable.php on line 1419