Here's the log:

2022-06-28 14:21:26,968 MainThread udi_interface      ERROR    udi_interface:write: No module named 'elkm1_lib'
2022-06-28 14:25:42,871 MainThread udi_interface      INFO     polylogger:set_basic_config: set_basic_config: enable=True level=30
2022-06-28 14:25:45,634 MainThread udi_interface      INFO     __init__:<module>: UDI Python Interface for Polyglot version 3 3.0.46 Starting...
2022-06-28 14:25:45,655 MainThread udi_interface      ERROR    udi_interface:write: Traceback (most recent call last):
2022-06-28 14:25:45,656 MainThread udi_interface      ERROR    udi_interface:write: File "/var/polyglot/pg3/ns/00:0d:b9:53:3f:34_15/./elk-poly.py", line 10, in <module>
2022-06-28 14:25:45,658 MainThread udi_interface      ERROR    udi_interface:write: from nodes import Controller
2022-06-28 14:25:45,659 MainThread udi_interface      ERROR    udi_interface:write: File "/var/polyglot/pg3/ns/00:0d:b9:53:3f:34_15/nodes/__init__.py", line 4, in <module>
2022-06-28 14:25:45,660 MainThread udi_interface      ERROR    udi_interface:write: from .Zone import ZoneNode
2022-06-28 14:25:45,661 MainThread udi_interface      ERROR    udi_interface:write: File "/var/polyglot/pg3/ns/00:0d:b9:53:3f:34_15/nodes/Zone.py", line 6, in <module>
2022-06-28 14:25:45,663 MainThread udi_interface      ERROR    udi_interface:write: from elkm1_lib.const import (
2022-06-28 14:25:45,663 MainThread udi_interface      ERROR    udi_interface:write: ModuleNotFoundError
2022-06-28 14:25:45,664 MainThread udi_interface      ERROR    udi_interface:write: :
2022-06-28 14:25:45,665 MainThread udi_interface      ERROR    udi_interface:write: No module named 'elkm1_lib'

 

@Bumbershoot My guess is you must have run a random update recently. 

Please see this topic for information that might help:

 

Upgrading udx to 3.0.5 and rebooting the Polisy solved this issue.