[RCU] php fatal error

Setting up RC 1.33 on linux. Test send/imap connect fine. When I login however no email or folders are listed whatsoever. My RC error log shows

[04-Jan-2019 15:54:22 America/Los_Angeles] PHP Fatal error: Call to a member function get_folder() on a non-object in /var/www/html/roundcube/public_html/program/steps/mail/compose.inc on line 63

[04-Jan-2019 15:54:22 America/Los_Angeles] PHP Stack trace:

[04-Jan-2019 15:54:22 America/Los_Angeles] PHP 1. {main}() /var/www/html/roundcube/public_html/index.php:0

[04-Jan-2019 15:54:22 America/Los_Angeles] PHP 2. include_once() /var/www/html/roundcube/public_html/index.php:303

Please advise. Thank you!