Facebook is blocked

Hello James,
Thank you for reaching AVG Support Community.
We're glad to look into this and help you.
Please clarify the below information, to assist you with an appropriate solution.
Please let us know the name of the AVG programs which installed on your PC.
May I know, how do you suspect the AVG causing this issue?
Have you turned off any AVG programs and confirmed it?
If yes, please mention the name of the AVG program.
If you receive any pop-ups from AVG saying blocked, provide us with the screenshot of the same.
Please disable AVG Internet Security temporarily and check if it resolves the issues. 
To disable the AVG Internet Security, refer to this article.
Also, turn off the AVG Secure VPN and check the status.
Keep us posted.
Thank you.

How do I get AVG to quit blocking facebook?

Hello James,
Thank you for reaching AVG Support Community.
We're glad to look into this and help you.
Please clarify the below information, to assist you with an appropriate solution.
Please let us know the name of the AVG programs which installed on your PC.
May I know, how do you suspect the AVG causing this issue?
Have you turned off any AVG programs and confirmed it?
If yes, please mention the name of the AVG program.
If you receive any pop-ups from AVG saying blocked, provide us with the screenshot of the same.
Please disable AVG Internet Security temporarily and check if it resolves the issues. 
To disable the AVG Internet Security, refer to this article.
Also, turn off the AVG Secure VPN and check the status.
Keep us posted.
Thank you.