Nokia 7710 User Manual page 135

Unable to activate VPN connection. See VPN log for details.
Legacy authentication failed or the certificate that you use
to authenticate to the VPN gateway is missing, expired, or
its validity period has not begun yet.
Check the date and time settings on the smartphone.
To update a VPN policy, select a VPN policy in
and tap Update.
VPN policy deleted. Try redefining VPN access point.
The VPN policy that was associated with the VPN access
point became obsolete and was deleted automatically.
To associate another VPN policy with the VPN access point,
in Control Panel > Internet Setup, select the VPN
connection again and associate a valid policy to it.
Policies
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