Have you try to do the steps from this source : [KB2850] Troubleshooting for "Modules update failed" message
If you do the steps from the above source like re-installation of the product and if the problem still exist, I just want to ask if your internet provider is Telstra? if yes, then I believed your concern is related with existing problem with the older version of Telstra  modem, for your reference see the below information from ESET HQ: 

"I have had a number of these cases over the last week and they all seem to be Telstra customers.
Nothing we do fixes it and getting people to use a mobile phone hotspot is the quickest way to get them up and running again.
I get them to call Telstra to check their line.  I find Telstra are fairly quick at sending out replacement modems to their customers ( I was sent 2 after a series of line checks kept indicating my modem was faulty about 3 years ago now)- ESET HQ"




For Troubleshooting purposes, I saw some of the similar issue that you have - see the below information for your reference:


Recommendation :
From the previous support that we have, we recommend to our client to connect  the device from their hotspot from their mobile device and try to click update from the ESET Program  > if the detection engine is successfully update then, the problem is 'Telstra issue' you need to contact them and request the replacement of the updated version of Telstra modem

For your reference see the below response from our client :

"Hi Gilben 
I have had support from Telstra Townsville and the support man advised that the modem firmware 2.2.2.4 in the v7610 modem had caused issues and replaced the firmware with the earlier release 2.2.2.3 version remotely.
All clients updated as expected.
Thanks for your help"


Please inform us, how you go

If your Internet Provider is not Telstra, then feel free to response from this ticket we can do a remote session to do some troubleshooting, for me to be able to remote your affected device follow the below procedure:



Please click on the below link to install an application that will allow us to provide you with Remote Assistance:



Splashtop:  https://sos.splashtop.com/en/sos-download


 

 

Important: Never allow anyone to remotely access your device unless you are absolutely certain of their identity. If you’re unsure, always verify by finding the official phone number of the organisation the caller claims to represent—never use the number they provide. Stay vigilant, and if in doubt, it's safer to decline the session.

 

Microbe is an authorised ESET Platinum Partner.