Make sure you're using the correct version (1.9), on your Minecraft launcher select "Edit Profile", then select "Use version" and choose 1.9.
^ You may be able to log into the hub but you need 1.9 to be able to join the current servers (Survival and Skyblock) If you notice others experiencing the same issue, please do inform them as well ( ᐛ )و However, if it's something else that seems to be stopping you from getting on even though you're on 1.9, please tell us in more details and we will look into the issue. Hope you enjoy yourself !
might have been because at that time they where still doing maintainance(probbly typed that wrong xD)
