Avast Business Antivirus - blank window pops up

Is anyone else experiencing a blank pop-up window from Avast when you boot-up a computer on newest client 17.8?

We have it all over our school, since the clients updated. This is Avast for Business version. I have a post over there, but no one responds: https://forum.avast.com/index.php?topic=211409.0

Thanks

Happens every reboot on all computers (120-ish): https://imgur.com/a/8AU9G
I did try to repair but to no avail (W7 / W10 / x32 / x64).

PS. Damn this capcha thingy is small on new monitors…

Captcha is only needed for your first 3 posts. (Spam protection)