Domain Indicated as Infected without evident problem

Hello Lorenzo,
Thank you for contacting AVG Community Support.
We apologize for the inconvenience caused. We'll check and help you out.
Kindly share the screenshot of the infection detection by expanding the "See details" present in the pop up, so that we can check and assist you further.
Refer this article to create one - https://support.avg.com/SupportArticleView?urlname=avg-create-screenshot
You can post the screenshot here in your topic. Click on Answer & then click on the Image [mountain symbol] & follow the instructions. 
Awaiting your response.

Hello Lorenzo,
Thank you for contacting AVG Community Support.
We apologize for the inconvenience caused. We'll check and help you out.
Kindly share the screenshot of the infection detection by expanding the "See details" present in the pop up, so that we can check and assist you further.
Refer this article to create one - https://support.avg.com/SupportArticleView?urlname=avg-create-screenshot
You can post the screenshot here in your topic. Click on Answer & then click on the Image [mountain symbol] & follow the instructions. 
Awaiting your response.

Hi all,
we are developer and we build lots of app/webapp. One of them is indicated as infected by AVG Web Shield and we did not found any good reason to act in order to remove this advice from users using your instrument. Could you give us support to understand the cause or usefull information.

We checked the content and also done some dns/IP check:

https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3aapp.ffl.it&run=toolpage

The domain is https://app.ffl.it

Please help us to help our customers