EasyDiscuss app (v2.0.1) bug

Hello, when we activate this ES app we get an error on the community page.
we are using the latest ED and ES versions (4.0.11 & 2.0.3)

 Fatal error: Uncaught Exception: DateTimeZone::__construct(): Unknown or bad timezone (1) in /srv/users/-/apps/-/public/administrator/components/com_easydiscuss/includes/easydiscuss.php:188 Stack trace: #0 /srv/users/-/apps/-/public/administrator/components/com_easydiscuss/includes/easydiscuss.php(188): DateTimeZone->__construct('1') #1 /srv/users/-/apps/-/public/administrator/components/com_easydiscuss/includes/post/post.php(2349): ED::dateWithOffSet('2016-11-10 14:4...') #2 /srv/users/-/apps/-/public/media/com_easysocial/apps/user/discuss/themes/default/streams/post.preview.php(26): EasyDiscussPost->getDateObject() #3 /srv/users/-/apps/-/public/administrator/components/com_easysocial/includes/template/template.php(287): include('/srv/users/serv...') #4 /srv/users/-/apps/-/public/administrator/components/com_easysocial/includes/themes/themes.php(198): SocialTemplate->parse(NULL) #5 /srv/users/-/apps/-/public/administrator/components/com_e in /srv/users/-/apps/-/public/administrator/components/com_easydiscuss/includes/easydiscuss.php on line 188

this app is actually its disabled.
can you advice please ?