The error "PTY allocation request failed on channel 0" typically occurs when you try to establish an SSH connection, and the server denies or cannot allocate a pseudo-terminal (PTY). This can be due to misconfigurations on the server or client side, or because you're running a command where no PTY is needed.
Error example:
user@art:~$ ssh root@articaservuser@articaserv's password: PTY allocation request failed on channel 0Connection to articaserv closed by remote host.Connection to articaserv closed.
On the left menu, go to Your system > OpenSSH server
- Down to limits section and click on Allow Terminal option
- turn on the “Allow Terminal” option and click on Apply button
