websites blocked

I’ve been trying to solve this for a long tiime…I’m not a real geeky computer user…and i just use the override directions and it works…excpet for wiki…I can’t get onto wiki…

is there a chance this is being caused by some setting in avast…on a mac…10.11.6

since last AVAST update, my wife’s computer cannot access previously used websites (all legit Australian financial services companies) with the following error
I did make choices in the installation of the update, but cannot find out what needs to be changes to alow these websites to be seen and used. Help please!

Hello,
You have posted this on Mac forum; please ask on Windows forums…
Kind regards,
Ondrej Kolacek