There’s a workaround to disable the ads (shown for the VPS updates) until it’s fixed…
You need to uncheck the Show notification box after automatic update (avast UI > Settings > Update - scroll down to details).
Some of the PCs which had the issue are getting resolved so fast enough the issue should be resolved.
If you want to disable all pop-ups… you need to enable silent/gaming mode BUT this will stop all notifications including malware alerts etc.