You need Lightroom 6.5 or later for the Canon 80D.
As an alternative, you can download the latest Free DNG converter:
You need to purchase Lightroom 6.5/Lightroom CC 2015.5 or later.
Or you can use the free Adobe DNG Converter version 9.5 or later.
Lightroom uses camera raw plugin to read the raw files from the camera.
Please check the link below for the version of camera raw and Lightroom required for the camera.
In your case the minimum version of camera raw plugin required for Canon 80D is ‘9.5’ and the minimum version of Lightroom you need is Lightroom 6.5 or Lightroom CC 2015.5.
Upgrading to Lightroom 6.5 or Lightroom CC 2015.5 would fix your issue with importing raw files from Canon EOS 80D into Lightroom.
Hope this clarifies your query.
thank you that solves my problem....will have to consider the upgrade ..