Hi @Mario panzeri The latest update for the Tv is 2010.0 from 2020. If you do not have this can download to USB and update that way. https://www.samsung.com/uk/support/model/UE55ES6100WXXN/ Ensure apps have latest version but may be set to Auto Update.
However if that is not the issue or does not solve it firstly try a soft Reset by holding down the Power Button on the Remote for around 5 seconds until the Tv reboots.
if still problem reboot both Tv and Router , reconnect after 30 seconds and see if Apps work. If necessary could Factory Reset.
Another possible solution is to change the DNS settings. Go to Network-Network Settings-DNS Settings. Change from Automatic to to 126.96.36.199 or 188.8.131.52. (Google servers) or 184.108.40.206 or 220.127.116.11 (Open DNS)<br><br>Some information here https://thevpn.guru/configure-samsung-smart-tv-dns/
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .