The latest version of AOL Mail is not supported on your browser

Today on my AVG Secure Browser, Yahoo Mail is giving the following message "The latest version of AOL Mail is not supported on your browser. Please use a supported browser below or use basic Mail." They give the options as Edge, Google Chrome, Firefox or to continue with basic mail. I would really prefer to use AVG S.B. but not if I cannot readily access my Yahoo account and my Yahoo calendar . Can anyone say whether this a Yahoo or an AVG issue?
I would asked AVG directly however they do not have an e-mail option only livechat and phone. The latter I find very difficult to use due to accessibilty problems.

Thank you

Hi Lawrence,
Thank you for contacting AVG Community Forum. I see you are facing issues with your browser. I am sorry for the inconvenince. I would like to suggest you to update and check if the issue remains. Could you please share us the screenshot of the page (https://support.avg.com/SupportArticleView?urlname=AVG-Create-screenshot) which shows the error? 
You can post the screenshot here in your topic. Click on Answer & then click on the Image [mountain symbol] & follow the instructions. Thanks in advance.

Hi Lawrence,
Thank you for contacting AVG Community Forum. I see you are facing issues with your browser. I am sorry for the inconvenince. I would like to suggest you to update and check if the issue remains. Could you please share us the screenshot of the page (https://support.avg.com/SupportArticleView?urlname=AVG-Create-screenshot) which shows the error? 
You can post the screenshot here in your topic. Click on Answer & then click on the Image [mountain symbol] & follow the instructions. Thanks in advance.

Hello, 
Thank you for the prompt response. Here is a screenshot as requested. 

User-added image

Hello Lawerence.
Thank you for the screenshot.
Sorry for the trouble caused.
We will certainly help.
We have sent you an email regarding your concern.
Please do check.
Thank you.