My kid goes to a school that uses Infinite Campus and I suddenly started getting an error where I was unable to log into the site.
I tried different browsers, clearing cookies and nothing seemed to help.
The error:
This site can’t be reached campus.dcsdk12.org took too long to respond.
Try: Checking the connection
ERR_CONNECTION_TIMED_OUT
In the Android app, I got a much less helpful error message about something going wrong with the connection. The odd thing was that the site and app was working for everyone else in my family.
Finally I was able to figure out that the issue was that I was on a VPN. Once I disabled the VPN, I was able to successfully use the site and app. Lucky for me, my VPN allows me to add apps to an exception list. Adding campus Infinity to the exception list in my VPN app fixed the connection issue for me.