If you didn't configure LLDP and try to show neighbors, this will result in an error.
[email protected]:~$ show lldp neighbors Traceback (most recent call last): File "/usr/libexec/vyos/op_mode/lldp_op.py", line 145, in <module> neighbors = minidom.parseString(_get_neighbors()) File "/usr/lib/python3.7/xml/dom/minidom.py", line 1968, in parseString return expatbuilder.parseString(string) File "/usr/lib/python3.7/xml/dom/expatbuilder.py", line 925, in parseString return builder.parseString(string) File "/usr/lib/python3.7/xml/dom/expatbuilder.py", line 223, in parseString parser.Parse(string, True) xml.parsers.expat.ExpatError: syntax error: line 1, column 0