Cannot edit agenda in Administrator edit mode or as a member in member mode.

Did not know that AVG had a browser. 

Frankly, though, we do not have the resources or time to test every obscure browser out there.  I do refer to compatibility charts at  caniuse.com/ when I make changes. 

Ok, I installed AVG secure browser to check it out and test for problems.   It appears to just be a modification to the Chrome browser, which is my normal browser.

I did not see any problems loading our test website in the "AVG Browser".   I am inclined to wonder if it somehow blocks the download of updated Javascript files.

If you are comfortable with it, I would appreciate getting a screen capture of any errors that show in the Developer Console of the "AVG Browser".