[Plugin: WP Changes Tracker] Fatal PHP error on first login of new site

Hi, running WP multisite and BuddyPress (latest), I get the following error when trying to login to a newly created site for the first time:

PHP Fatal error: Call to undefined function wp_get_current_user() in /var/www/html/wp-content/plugins/wp-changes-tracker/wp-changes-tracker.php on line 206, referer: https://example.com/blogs/create

For the user, this is a 500 error. If the user refreshes the page, they are presented with the login page as expected.

https://www.ads-software.com/extend/plugins/wp-changes-tracker/