OctoPrint-ETA Blank in web console

Hi There.

I have been playing with Octo print for the last few weeks and I love what functions it gives me for my Ender 3 Pro.

I installed the Display ETA "OctoPrint-Display-ETA" plugin and for some reason, I don't get the ETA on the web console but do on the machine display

what I see in the web console
image

what I see on the printer display
image

I have spent a few days googling this but can't seem to find a solution that works. It seems most people are using OctoPrint on a raspberry pi and don't seem to have an issue it just seems to work.

Any ideas what might be going on?

Setup - OctoPrint installed on Windows 8.1 machine connected to the printer via USB and printer running stock firmware

Thanks, Nick

Which OP-, ETA-and Python-Version do you use?
Did you look into the octoprint.log file?

I'm using the following

Python: 2.7.14
OctoPrint: 1.3.12
Display ETA: 1.0.2

Yes I've taken a look through the logs and I see the following

2020-03-24 01:00:43,888 - octoprint.server.heartbeat - INFO - Server heartbeat <3
2020-03-24 01:03:03,443 - octoprint.printer.standard - ERROR - Exception while sending print progress to plugin octoprint_eta
Traceback (most recent call last):
File "c:\octoprint\venv\lib\site-packages\octoprint\printer\standard.py", line 236, in call_plugins
plugin.on_print_progress(storage, filename, progress)
File "c:\octoprint\venv\lib\site-packages\octoprint_eta_init_.py", line 42, in on_print_progress
self.eta_string = self.calculate_ETA()
File "c:\octoprint\venv\lib\site-packages\octoprint_eta_init_.py", line 30, in calculate_ETA

But I'm still getting my head around Python and not sure where to start looking. I have taken a look through the gcode console and can see ETA code being generated, but not sure what "Display ETA" uses M117 or M73 to bring this information to the web console

image

I'm not sure what I'm missing, thoughts?

Thanks for your assistance

Nick