Getting Undefined Offset

[SeritiAutomation]

I installed mantis 2.16.0 and after installing i installed this plugin; plugin installed successfully, but getting below error while configuring.
SYSTEM NOTICE: 'Undefined offset: 0' in 'E:\Bitnami\mantis-2.16.0-0\apps\mantis\htdocs\plugins\agileMantis\libs\class_agileuser.php' line 114
SYSTEM NOTICE: 'Undefined offset: 0' in 'E:\Bitnami\mantis-2.16.0-0\apps\mantis\htdocs\plugins\agileMantis\libs\class_agileuser.php' line 117
SYSTEM NOTICE: 'Undefined offset: 0' in 'E:\Bitnami\mantis-2.16.0-0\apps\mantis\htdocs\plugins\agileMantis\libs\class_agileuser.php' line 120
SYSTEM NOTICE: 'Undefined offset: 0' in 'E:\Bitnami\mantis-2.16.0-0\apps\mantis\htdocs\plugins\agileMantis\pages\footer_menu.php' line 42