Please perform the below steps:
>Perform Interactive checks through Samsung Members app (Samsung Member> Get Help> Interactive checks->wi fi ).
>Reset network settings (Scroll down notification panel >Settings >General Management >Reset Reset network settings).
>Reset the device settings by navigating to Settings >> General Management >> Reset >> Reset Settings.
For further assistance, register your concern in Samsung members app(Open Samsung members app>click on “+“icon>send feedback>Error report/ Ask Questions).
Team Samsung Member