I want initiate to work with template project but when i tried to add new task in module with gannt not work.
So i install a fresh 7.8.3 to try the functionality and do the same…
in apache error.log i find:
[Mon May 08 20:34:07.521764 2017] [:error] [pid 1319] [client] PHP Notice: Undefined index: task_id in /var/www/seicrm/modules/AM_ProjectTemplates/controller.php on line 230, referer: http://seitest.crm/index.php?module=AM_ProjectTemplates&offset=1&stamp=1494268429016898600&return_module=AM_ProjectTemplates&action=view_GanttChart&record=f35ef41b-edf2-9c26-9339-5910b934d9bf

[Mon May 08 20:34:07.522541 2017] [:error] [pid 1319] [client] PHP Fatal error: Call to a member function format() on boolean in /var/www/seicrm/modules/AM_ProjectTemplates/controller.php on line 252, referer: http://seitest.crm/index.php?module=AM_ProjectTemplates&offset=1&stamp=1494268429016898600&return_module=AM_ProjectTemplates&action=view_GanttChart&record=f35ef41b-edf2-9c26-9339-5910b934d9bf

this is my appliance:

PHP 5.6.30-0+deb8u1 (cli) (built: Feb 8 2017 08:50:21)
Copyright © 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright © 1998-2016 Zend Technologies
with XCache v3.2.0, Copyright © 2005-2014, by mOo
with Zend OPcache v7.0.6-dev, Copyright © 1999-2016, by Zend Technologies
with XCache Optimizer v3.2.0, Copyright © 2005-2014, by mOo
with XCache Cacher v3.2.0, Copyright © 2005-2014, by mOo
with XCache Coverager v3.2.0, Copyright © 2005-2014, by mOo

mysql Ver 14.14 Distrib 5.5.55, for debian-linux-gnu (x86_64) using readline 6.3

thanks in advance