JS:includer-BJH [Trj]

Hi can anybody help me? I went to log on to an online banking on my PC but avast gave me a warning about JS:includer-BJH [Trj]. I quit and done full virus check, malware check and Spybot check with no results. I then tried logging on using a laptop that I know to be brand new with an updated avast install which gave the same warning. I’ve tried contacting them but nearly 24 later I’m still waiting for a reply . Is it some kind if avast thing or an I seeing it as some kind of java script thing? Also I don’t know if it’s useful but my PC is running windows 7 and my laptop windows 10.

https://www.avast.com/report-a-url.php