Hello Steven,
I am sorry for the inconvenience caused.
Are you using the free, trial or paid version of AVG Antivirus?
Have you tried reinstalling the AVG program once?
i have used AVG well over 10 years. the latest update has caused gmail to fail periodically - and add-ons lastpass and pinterest to not work. no choice but to disable. hopefully, the next update will correct.
Hello Steven,
Thank you for the information. Please disable AVG (Open AVG Internet Security > menu > settings > Troubleshooting > Passive Mode > Turn off the AVG Passive mode) and check if Gmail is working fine. Also, let us know from where you are checking the Gmail account, is it from email client or web browser?