Avast Online Security could not be verified for use in Firefox and has been disa

I get the following message in Firefox. “Avast Online Security could not be verified for use in Firefox and has been disabled.” What is going on with Avast. I stopped using it for a while. I recently added it to my computers and even purchased a license. Are they going to fix this problem?? I don’t feel safe online especially when doing online banking. What’s the poop on this. Do I need to get my money back and revert to another antivirus to feel safe???

Hope someone can answer this for me.

See: https://forum.avast.com/index.php?topic=174974.0