Permiere Pro not sending to Media Encoder

I know this has been reported before, and in some cases solved, however I believe that I have followed every suggestion and still can not get Premiere to use Media Encoder. 

  Firstly the versions etc. 

  Intel Core Ultra 7 265K - 64.0 GB

  Windows 11 Pro - 24H2 26100.4770

  Premiere Pro 25.3.0 (Build 84)

  Media Encoder 25.3 (Build 73)

When I send a sequence to Media Encoder nothing happens. If Media Encoder is already running the export job does not appear in the queue. If I export directly from Premiere everything works fine.

What I have tried.

• I have reset the preferences for Premiere Pro and Media Encoder
• I have uninstalled Media Encoder not saving preferences etc. Restarted Windows. Installed fresh.
• Same for Premiere Pro.
• I have tried with the Firewall off.
• I have tried making a new fresh and simple project from scratch, but no difference. 

This behaviour started a few days ago. Everything up to then was fine. I can't think of anything that has changed around that time. 

I have tried everything I know except a complete Windows Reinstall, which I don't want to do as it will take me days to reinstall everything.

I don't think there are any issues on my system generally as I also have Premiere Pro Beta and Media Encoder Beta installed and they work correctly with no issues. So something has happened that has affected Premiere Pro but has not affected the beta versions. It's a mystery!

Any help will be gratefully received.

Peter