Hi,
I installed Norton Security for Mac 7.3 on macOS Sierra 10.12.3
On Safari, I chose "Add" button to add the Norton Extension.
But I got an Error like below.
"Could not add Norton Extension to Safari"
"We are unable to add the Safe Web extension to Safari. If you have seen this message before, please contact Support"
I reinstalled my macOS and Norton, but it wasn't solved.
Recently, I got another Error:
"Norton Security is unable to continue. Please restart your Mac to stay protected. If the problem still persists, please click here".
Help!!