getting invalid security certificate when logging in to shaw go wifi

[alexandreajory]

i'm running Mac iOS High Sierra (10.13.5) and Safari gives me an error message, when i try to access Shaw Go wifi, that my security certificate is expired. how do i get a valid security certificate?

[#2]

Sounds like Shaw needs to update the security certificate, but could also be your browser has cached the old one.

When did it expire?