Undefined variable: time includes/class-ogf-notifications.php line 268

Version: 1.6.2
File: olympus-google-fonts/includes/class-ogf-notifications.php
Function: OGF_Notifications::addon()

Issue: Line ~286 has a fragment esc_html( $time ), however $time is undefined.

I believe this function should have something like the following at line ~2:
$time = $this->seconds_to_words( time() - get_site_option( $this->date_option ) );

The effect of this is that in dev environments (ie debugging on), the system renders a stack trace in the ‘Speed Up Your Website!’ notice on admin pages.

Thanks