Do you have any security Apps (such as Norton) or VPN installed on your iPad/iPhone? If so, these may be interfering with your devices network connection. If present, it may be necessary to temporarily remove such Apps from your iPad - and then perform a forced-restart.
Force restart iPad - Apple Support
Force restart iPhone - Apple Support
If the problem is only apparent when connected to your home WiFi, a restart of your WiFi Router is recommended.
To restart your router, disconnect power from the router for at least 30 seconds - then reconnect power to restart. After your router reboots (which may take several minutes), force restart your iPad/iPhone.