Is accountlink.yahoo.com really a phishing site?

Hello David,
I am sorry to hear about this. But please provide the screenshot of AVG threat detection pop up to assist further.
To create a screenshot, please click here .
When I try to link my Yahoo Mail accounts, when I add an email address and password, an AVG message states that accountlink.yahoo.com is a phishing site and blocks it.  Is this true?  If it isn't a phishing site, how do I get around the AVG block?

Here is a screenshot of the AVG message that occurs when I try to link a second email account in Yahoo Mail.User-added image

Here is the whole URL:
User-added image

David, For your info, just in case that you are unaware, you can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions. 
AVG Guru

David,

Thank you for providing us the screenshot.
Unfortunately, we're unable to see the URL path that is being detected.

Could you please click on See Details and then attach a screenshot?

Here is the whole URL:
User-added image

Thank you for providing screenshot David,
It seems the AVG detection is false positive. I request you to submit a sample here (https://www.avg.com/submit-sample), it will reach to our senior team. They will analyze the situation and provide you with a solution.
Best regards,
Alok.

Hello David,
I am sorry to hear about this. But please provide the screenshot of AVG threat detection pop up to assist further.
To create a screenshot, please click here .