Activation error

I’m trying to activate the plugin on a new site and keep getting this error after the screen where I confirm my email.

Fatal error: Uncaught Error: Call to a member function authenticatedUrl() on null
in /public_html/wp-content/plugins/malcare-security/wp_admin.php on line 64

Call stack:

MCWPAdmin::initHandler()
wp-includes/class-wp-hook.php:287

WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:311

WP_Hook::do_action()
wp-includes/plugin.php:478

do_action()
wp-admin/admin.php:170