Fatal Error on Node.php

Hi there, we have all plugins and themes up to date and recently getting a fatal error with Tubepress Pro 5.1.8

First error
PHP Fatal error: Unparenthesized a ? b : c ? d : e is not supported. Use either (a ? b : c) ? d : e or a ? b : (c ? d : e) in /nas/content/live/markfinch/wp-content/plugins/tubepress_pro_5_1_8/vendor/twig/twig/lib/Twig/Node.php on line 217, referer: https://learning.markfinch.ca/wp-login.php?redirect_to=https%3A%2F%2Flearning.markfinch.ca%2Fwp-admin%2F&reauth=1

I tried commenting out the if statement there but the error keep jumping around.

Thanks,
Lawrence