URL:Mal False positive

Our clients having issue since yesterday when Avast and AVG antivirus are blocking all files downloaded from our domain hxxps://files.pyrus[.]com

We provide task tracker solution for our clients and provide an ability to share files between each other.

How we could remove our domain from blacklist, found a reason why we were blocked and prevent it from happening in the future?

PS I send report yesterday using this web from https://www.avg.com/ru-ru/false-positive-file-form - zero reaction.

Finally got reply from AVG Customer Care.
Hope this won’t happen again.
Thanks