"This page canrsquo;t be displayed" what does it mean?

[BGrewer]

Tried to get on Facebook and I got this:


Does anyone know what it means?

 

[anon(7901790)]

Could you access other websites?

 

[Laura Knotek]

Are you using a workplace WiFi network? Could the firewall be blocking Facebook?

Sent from my Moto X using Tapatalk

 

[BGrewer]

I was able to access other websites and I tried Facebook about a hour later and it worked, this was using WiFi

 

[jojoe42]

I get this screen too, but only at my workplace WiFi where some sites are blocked. Funnily enough it turns up when I try to access non-blocked sites