Thanks for reply,
I have Avast free latest build, windows 10 1903 64 bit, Malwarebytes installed but no realtime scanning, and Comodo firewall. I have used Avast for a good few years now, really its my go to antivirus.
If I disable Avast plugins run as normal, if Avast is enabled then plugins don't load properly, usually in the past I would have got some sort of notification from Avast but not this time.
Thanks again.
Joe