Internal Server Error 500 after WordPress 5 Update

After update to wordpress 5.0.1 and updated Divi-Theme and Dokan-Plugin, the front-end results in a white page internal server error 500.

Front-End still works, if:

1. Dokan-Plugin is turned off and Divi-Theme is enabled, or
2. Dokan Plugin is enabled and Standard is enabled (Divi-Theme is off)

Debug.log reports a warning and an error

PHP Warning: require_once(/www/wp-content/plugins/dokan-lite/includes/theme-support/class-Divi.php): failed to open stream: No such file or directory in /www/wp-content/plugins/dokan-lite/includes/class-theme-support.php on line 44
[19-Dec-2018 08:37:08 UTC] PHP Fatal error: require_once(): Failed opening required /www/wp-content/plugins/dokan-lite/includes/theme-support/class-Divi.php’ (include_path=’.:/usr/local/php-7.1/lib/php’) in /www/wp-content/plugins/dokan-lite/includes/class-theme-support.php on line 44

Any ideas?

Thanks
aliossi