To "Reset network settings" then go to device Settings > General management > Reset > then "Reset network settings" only and then try. Screenshots below...
Dear Samsung Member,
Greetings from Samsung Customer Support!
Please perform the below mentioned steps to resolve the issue:
1. Try after rebooting the phone
2. Update the software of the device (if available) go to Settings > Software update > Download and install > Checking for software update. Restart your device after the update has finished.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > click on “+“icon > send feedback > error report/ask questions).
Thank you for writing to Samsung.
Samsung Customer Support