Hi Joe,
Most likely the OpenVPN server has started rejected your login details. However I'd recommend checking both the
OpenVPN log and the
Console to ensure that the Authentication Failed (AUTH_FAILED) message isn't appearing for another reason (the OpenVPN server can sometimes send an AUTH_FAILED message for a different reason).
Viscosity should be flushing the saved details in your KeyChain when that error message appears, so it is unlikely this is the cause. However you may like to ensure any old saved details have been removed from the KeyChain manually. Instructions for doing this
can be found here.
Otherwise I'd recommend getting in touch with your
VPN Provider to ensure your account details are still valid.
Cheers,
James