Error: Task::WithSubtask" at src/Task/WithSubtask.pm line 81

[docco13]

I have this error when run openkore
Packet parser: Unknown switch: 02E7
Packet parser: Unknown switch: 027B
Removed actor with off map coordinates: ......
.........

And my char does not see monster, when I click mouse in monster (unkown#.....)
The screen apperances:

OpenKore version what-will-become-2.1 (SVN Version)
@ai_seq = attack route
Network state = 5
Network handler = Network::DirectConnection
SVN revision: 7159
No loaded plugins.

Error message:
(in cleanup) Can't locate object method "DESTROY" via package "Task::WithSubtask" at src/Task/WithSubtask.pm line 81.

Stack trace:
(in cleanup) Can't locate object method "DESTROY" via package "Task::WithSubtask" at src/Task/WithSubtask.pm line 81.
at src/Interface/Wx.pm line 155
Interface::Wx::mainLoop('Interface::Wx=HASH(0x4fb5024)') called at openkore.pl line 96
main::__start() called at start.pl line 125

Died at this line:
my ($self) = @_;
* $self->SUPER::DESTROY();
delete $self->{ST_mutexesChangedEvent} if ($self);

How can I solve this problem?
Please help me
Thank a lot

[Technology]

indeed, there is a missing DESTROY method in the Task class,
possibly caused by a wrong serverType or incorrect packet lengths

the error will be fixed in next revision

EDIT: should be fixed