Found it. It was in the class-trackserver-shortcode.php file.
Thank you so much. Upgraded php and all seems fine now. Thank you for the great plugin.
Yes, It is in the class-trackserver-settings.php on line 322. Sorry I didn’t put that info initially. 🙂
PHP version is 7.2.34
WordPress version: 6.1.1
Apache
Linux
Thanks