in the last few days i've updated my F2-221 to TOS 5, after a little customization everytime i log in the web ui i get a popup message "Device is shutting down" and i cannot dismiss it. The nas is working with smb and via ssh, but i cannot complete my customization process. Can you help me?

Is there a cli way to clear cache of the web ui or something (i've already clean my browser's cache and even tried with Firefox and also Edge)
P.S. My language OS is italian.

