My b2evolution Version: Not Entered

My b2evolution Version: [4.0.5]

I wonder if any of you can solve this problem for me

In the administration menu Global Setting -> Plugins -> Install new
get this error after upgrading [3.3.3] to version [4.0.5]:

Warning: Missing argument 2 for load_class(), called in /home/user/public_html/plugins/am_dashboard_plugin/_am_dashboard.plugin.php on line 24 and defined in /home/podersoc/public_html/inc/_core/_class5.funcs.php on line 86

Notice: Undefined variable: classname in /home/user/public_html/inc/_core/_class5.funcs.php on line 89

Warning: Missing argument 2 for load_class(), called in /home/user/public_html/plugins/am_dashboard_plugin/_am_dashboard.plugin.php on line 25 and defined in /home/user/public_html/inc/_core/_class5.funcs.php on line 86

Notice: Undefined variable: classname in /home/user/public_html/inc/_core/_class5.funcs.php on line 89

Warning: Missing argument 2 for load_class(), called in /home/user/public_html/plugins/am_dashboard_plugin/model/_amd_widgetcache.class.php on line 30 and defined in /home/user/public_html/inc/_core/_class5.funcs.php on line 86

Notice: Undefined variable: classname in /home/user/public_html/inc/_core/_class5.funcs.php on line 89

Warning: Missing argument 2 for load_class(), called in /home/user/public_html/plugins/am_dashboard_plugin/model/_amd_widgetcache.class.php on line 33 and defined in /home/user/public_html/inc/_core/_class5.funcs.php on line 86

Notice: Undefined variable: classname in /home/user/public_html/inc/_core/_class5.funcs.php on line 89

Warning: Missing argument 2 for load_class(), called in /home/user/public_html/plugins/am_dashboard_plugin/model/_amd_widgetcache.class.php on line 34 and defined in /home/user/public_html/inc/_core/_class5.funcs.php on line 86

Notice: Undefined variable: classname in /home/user/public_html/inc/_core/_class5.funcs.php on line 89

Fatal error: Class 'WidgetCache' not found in /home/user/public_html/plugins/am_dashboard_plugin/model/_amd_widgetcache.class.php on line 41
 

thanks

Miguel Filomeno