Game was working just fine yesterday but now it won't connect to the servers and I can only play single player. Tried on another computer and would at least connect to the news for the launcher but would say that servers were down for maintenance when I tried to join a server. Have tried restarting computer, updating java, and turning off the firewall. Still no luck.
Thank you for your report!
However, this issue is Invalid.
This is a technical support issue; this site is for bug reports only. We do not have the resources to provide you with technical support.
Please contact the community support, linked below.
http://hopper.minecraft.net/help/technical-support-resources/