PHP Warning: Undefined array key

Hello,

We are getting these in the log:

[27-Jan-2025 16:26:49 UTC] PHP Warning:  Undefined array key "" in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417
[27-Jan-2025 16:26:49 UTC] PHP Deprecated:  ucfirst(): Passing null to parameter #1 ($string) of type string is deprecated in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417
[27-Jan-2025 16:26:56 UTC] PHP Deprecated:  preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /home/aaa/public_html/wp-includes/kses.php on line 1805
[27-Jan-2025 16:27:09 UTC] PHP Deprecated:  preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /home/aaa/public_html/wp-includes/kses.php on line 1805
[27-Jan-2025 16:27:13 UTC] PHP Warning:  Undefined array key "" in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417
[27-Jan-2025 16:27:13 UTC] PHP Deprecated:  ucfirst(): Passing null to parameter #1 ($string) of type string is deprecated in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417
[27-Jan-2025 16:27:33 UTC] PHP Warning:  Undefined array key "" in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417
[27-Jan-2025 16:27:33 UTC] PHP Deprecated:  ucfirst(): Passing null to parameter #1 ($string) of type string is deprecated in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417
[27-Jan-2025 16:27:35 UTC] PHP Warning:  Undefined array key "" in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417
[27-Jan-2025 16:27:35 UTC] PHP Deprecated:  ucfirst(): Passing null to parameter #1 ($string) of type string is deprecated in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417
[27-Jan-2025 16:28:13 UTC] PHP Warning:  Undefined array key "" in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417
[27-Jan-2025 16:28:13 UTC] PHP Deprecated:  ucfirst(): Passing null to parameter #1 ($string) of type string is deprecated in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417
[27-Jan-2025 16:28:26 UTC] PHP Deprecated:  preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /home/aaa/public_html/wp-includes/kses.php on line 1805
[27-Jan-2025 16:28:36 UTC] PHP Warning:  Undefined array key "" in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417
[27-Jan-2025 16:28:36 UTC] PHP Deprecated:  ucfirst(): Passing null to parameter #1 ($string) of type string is deprecated in /home/aaa/public_html/wp-content/plugins/woocommerce-notification/frontend/notify.php on line 417

Can you please issue a fixed version?

Thank you