"create new name to start" -> "unable to seal-more than 10 items in invent"

Soooo i played this many many years ago and felt like trying it again, i found my character which is on tespian server. The name is MindTricks#OU idk why. My account name is MindTricks. Level 22. When i click the server it automatically asks me to create a new name. When i do so, it go to a popup saying "cannot seal-more than 10 items in inventory". So i confirm/cancel. I click start, it goes to the same window, to make me create a new name. Same thing happens. Won't let me get on my character. Help?