Help needed with IBKR mobile

Hi,

I have and IBKR account and a paper trading account. after using both accounts for months, my paper trading account does not load charts. It says: "The chart cannot be displayed since the production username associated with this paper-trading username has an active session. End your previous session and please refresh."

I tried refreshing, logged out, in and out from both accounts in mobile and desktop versios. I uninstalled and reinstalled the apps, updated everything and nothing changes. My live trading account is fine but I cannot practice in the paper trading account. I submitted a ticket, got and AI answer that was not helpful. Do you have any tips for me? I want to continue to use the paper account to practice. Thanks