AVG Web/Mail Shield Root

Good day,
 
I am constantly receiving the below, and attached, error message when I start up Outlook – emails. I have contacted my website and email host provider who in turn have contacted the company that hosts the servers. I have changed settings and they say everything is as it should be.
 
However, I keep getting this message regarding a security certificate that cannot be verified which is from AVG; AVG Web/Mail Shield Root.
 
Can you help please?

Hello Clive,
Let's have a look at it together.
Unfortunately, we could view the screenshot you have attached.
Refer the below article to fix this certificate issue:
https://support.avg.com/SupportArticleView?urlname=AVG-Troubleshoot-invalid-email-certificate
Share the screenshot of error message if the issue persists.

Hello Clive,
Let's have a look at it together.
Unfortunately, we could view the screenshot you have attached.
Refer the below article to fix this certificate issue:
https://support.avg.com/SupportArticleView?urlname=AVG-Troubleshoot-invalid-email-certificate
Share the screenshot of error message if the issue persists.