Joomla! Template Hexite - Item Support

After installing the Hexite - Joomla! 3 template on local host with Quickstart I get the following error messages in the Frontend:
Notice: Indirect modification of overloaded property Joomla\CMS\Menu\MenuItem::$colw has no effect in C:\xampp\htdocs\raphael-tours\plugins\system\helix\core\classes\menu.php on line 93

Notice: Indirect modification of overloaded property Joomla\CMS\Menu\MenuItem::$colw has no effect in C:\xampp\htdocs\raphael-tours\plugins\system\helix\core\classes\menu.php on line 93

Warning: A non-numeric value encountered in C:\xampp\htdocs\raphael-tours\plugins\system\helix\core\helix.php on line 548

Warning: A non-numeric value encountered in C:\xampp\htdocs\raphael-tours\plugins\system\helix\core\helix.php on line 548

Warning: A non-numeric value encountered in C:\xampp\htdocs\raphael-tours\plugins\system\helix\core\helix.php on line 548
Hexite - Joomla! 3 Template

und auch:

Warning: A non-numeric value encountered in C:\xampp\htdocs\raphael-tours\plugins\system\helix\core\classes\menu.php on line 289

Warning: A non-numeric value encountered in C:\xampp\htdocs\raphael-tours\plugins\system\helix\core\classes\menu.php on line 289

Warning: A non-numeric value encountered in C:\xampp\htdocs\raphael-tours\plugins\system\helix\core\classes\menu.php on line 289

Warning: A non-numeric value encountered in C:\xampp\htdocs\raphael-tours\plugins\system\helix\core\classes\menu.php on line 289

Warning: A non-numeric value encountered in C:\xampp\htdocs\raphael-tours\plugins\system\helix\core\classes\menu.php on line 289

What can I do?
Hello PCMShaper Team,

Many bugs are now fixed, now it looks much better.
Three mistakes (same) are still there:

Warning: A non-numeric value encountered in C: \ xampp \ htdocs \ raphael-tours \ plugins \ system \ helix \ core \ helix.php on line 548

Best Regards
Andrea
Item Name:
Hexite
Author:
Sales:
21
Created:
2014-10-29
Updated:
2017-03-06
Item Version:
1.0.4
Supported Joomla:
Joomla 3 Product