Can't access drive.google.com on any browser

[hanzj]

Hello, i'm at a cafe, logged onto their free wifi network. I'm able to access my Gmail, Google Calendar, and any other website, but when I go to Google Drive (drive.google.com), Chrome browser gives me this error message:

The site's security certificate is not trusted!
You attempted to reach drive.google.com, but the server presented a certificate issued by an entity that is not trusted by your computer's operating system. This may mean that the server has generated its own security credentials, which Chrome cannot rely on for identity information, or an attacker may be trying to intercept your communications.
You cannot proceed because the website operator has requested heightened security for this domain.


I've tried with Opera and Firefox, and they also say the same thing. Please help.

[Habitual]

It may be a self-signed certificate, which are perfectly legit but do cause this symptom.
Can't you issue a "continue anyway"?

[hanzj]

On Chrome, there's no option to "Continue anyway". On Firefox, there is that option.

I'm not in that cafe anymore. I'm back home, where I don't have this problem anymore.

[Habitual]

perhaps the "free" wifi provider would rather you not access that resource?

[hanzj]

Habitual,
Maybe. But I don't see why they'd block google drive and nothing else.

[Habitual]

executables? Pr0n? There's a 100 reasons.