Can’t connect to my server
I can’t update my WhatsApp my phone keeps saying you can’t connect to server,an unknown error occurred
iPhone 6s Plus
Troubleshooting Wi-Fi issues in IOS
Do you have access to another WiFi network where you can try? That has worked for several people.
Try a restart.
Restart your iPhone, iPad, or iPod touch
Try a forced restart.
If necessary
Do a backup and try a factory reset. Then restore from your backup.
Backup - Restore your device from an iCloud or iTunes backup