Xperia XA2 connection via MTP not working properly

Hello, when i try to connect my Xperia XA2 Kvarken via MTP to my pc running linux mint 20.2, the Xperia XA2 symbol shows up on the desktop, but theres no mass storage or sd card available in it, its only an empty folder with zero objects in it (to which i have no access). a view days before everything worked like a charm. this is happening the first time and out of a sudden and i have no idea why. any help is appreciated, thank you,

I answer my question here by myself: restarting the XA2 fixed the problem. thanks for your attention