Pi 3 - Unable to "Update" on Public AP - Pi security stops it.

[Mustang65]

I am using a campground Public AP and trying to "Update" my Pi, but when I try, I get a not secure site and sends me back to the $Pi prompt. I am unable to download and programs as this error keeps coming up. If I plug in the Pi to my home network the Pi works fine. The desktop will not load either as it gives the same message. There is login security/PW to access the AP. I am dead in the water with my Pi projects for the next 30 days without the Pi being able to download anything. Last year, I was able to download on the same Pi, older software running. All the other toys have no issues with the AP.

Any thoughts
Any work around?

Thanks

[epoch1970]

Perhaps apt tries to use ipv6? You can force it to use ipv4, there are posts on this in the forum.
Otherwise the AP might be filtering domains...

[Mustang65]

I am able to connect to the AP/Internet now.

There were 2 issues, 1- under power, I was using a wall outlet with USB included, had to switch to a 2 amp transformer. 2- I had to use a browser (was using SSH) to see that there was a check box that needed to be checked on the login, for the first time accessed with a new piece of equipment. Seems to be working OK now. Was able to get an update successfully.

Thanks again
Don