Can't cast from PC Google Chrome to Chromecast unless I turn off AVG

Hello Marc,
Thank you for contacting AVG Community support.
We understand that you are unable to connect to chromecast with AVG turned on.
Please let us know which AVG program blocks the access to chromecast.
Do you any error message when trying to connect to chrome cast?
Help us with above requested information to get clarity on the issue.
Thank you.

Hi  I have looked into the community and found something from 6 years ago but did not help.  It was a link and the link seemed to be gone.  I have a Dell computer running Windows 10-Pro 64 bit.  I used to cast to my chomecast attached to my tv with no problems.  Now Google Chrome does not find my Chromecast when I try to cast.  I did find one comment somewhere that I would have to turn off AVG.  It did work but is there any other solutions that would work so I can keep AVG on and still cast?  Thanks!!!  Marc

What is happening is when I am in Google Chrome, and I have a website open, and I want to cast it to my tv, when I select cast from the drop down menu in the upper right corner of Chrome, it looks for my Chromecast and says it can not find any.  When I turn off AVG and try it, it finds my chromecast.   What can I do to keep my AVG operationg but still able to cast to my Chromecast?

Hello Marc,
Thank you for contacting AVG Community support.
We understand that you are unable to connect to chromecast with AVG turned on.
Please let us know which AVG program blocks the access to chromecast.
Do you any error message when trying to connect to chrome cast?
Help us with above requested information to get clarity on the issue.
Thank you.

Thank you for clarifying, Marc. Let us help you with the possibilities for this to happen. 
- If you're connected to internet through Secure VPN, then it would not detect the network devices, unless the specific option is enabled. 
- AVG Firewall would be blocking the access, as few firewall settings needs to be modified.
To identify the component that causes the issue, please disable AVG Firewall alone (Open AVG - Hacker attacks - click on toggle bar beside Firewall) or disconnect AVG Secure VPN & let us know the outcome.