For some reason you are not allowed to access an adventure island if one of your alts on your roster is located on an event island that spawns at specific times.
This is not a major issue, however it really bummed me out cause it was my last chance to enter an adventure island for the day and it took too long for me to switch to my alt and back in order to enter in time.
I don’t understand how or why the location of an alt in game should affect another from accessing content.