admin broken after latest update

Hello, since the latest update to v3.6.1

My admin in unavailable, reports a critical error. I see this in my error logs:

[11-Feb-2021 23:20:30 UTC] PHP Fatal error: Uncaught Error: Call to a member function get_defaults() on null in /XXXXXXXX/wp-content/plugins/stream/classes/class-admin.php:146
Stack trace:
#0 /XXXXXXXX/wp-content/plugins/stream/classes/class-plugin.php(152): WP_Stream\Admin->__construct(Object(WP_Stream\Plugin))
#1 /XXXXXXXX/wp-content/plugins/stream/stream.php(40): WP_Stream\Plugin->__construct()
#2 /wordpress-versions/5.5.2/wp-settings.php(325): include_once(‘/XXXXXXXX/wp-co…’)
#3 /XXXXXXXX/wp-config.php(66): require_once(‘/wordpress-vers…’)
#4 /XXXXXXXX/wp-load.php(37): require_once(‘/XXXXXXXX/wp-co…’)
#5 /wordpress-versions/5.5.2/wp-admin/admin.php(34): require_once(‘/XXXXXXXX/wp-lo…’)
#6 /wordpress-versions/5.5.2/wp-admin/index.php(10): require_once(‘/wordpress-vers…’)
#7 {main}
thrown in /XXXXXXXX/wp-content/plugins/stream/classes/class-admin.php on line 146

Anyone know how to fix it? Thanks!