Password management software such as LastPass can actually interfere with our VPN connection. It is recommended to exclude the VPN software (or VPN connection if you are not using our software) from LastPass, to ensure that the authentication is handled properly.
We especially see lots of issues with Android and LastPass, which is why we do not recommend using the two apps together on Android.
It is possible to have all of our VPN set-ups, including manual PPTP and L2TP connections save your username and password automatically. In fact, this is the default behaviour of most VPN configurations we offer.
If you still have questions, please feel free to contact support at any time by sending us a ticket here, and we will respond as soon as possible.