Option --upgrade error n: command not found

[sveeke]

[root@relay2 ~]# serverbot --upgrade
[i] New version of serverbot available, installing now...
[i] Create temporary file for self-upgrade...
[i] Download most recent version of serverbot...
[i] Set permissions on installation script...
[i] Executing installation script...
[i] Serverbot updated to version 1.0.3...
/bin/serverbot: line 1083: n: command not found
[i] New version of serverbot available, installing now...
[i] Create temporary file for self-upgrade...
[i] Download most recent version of serverbot...
[i] Set permissions on installation script...
[i] Executing installation script...
[i] Serverbot updated to version 1.0.3...

[sveeke]

I still have no idea what causes this error...