Could you connect to the router via SSH and execute command ipsec status?
Please, share the output here (Omit sensitive information).
Or it would be best if you could share a troubleshoot package generated right after trying to initiate IPSEC/L2TP connection.
Troubleshoot is generated in System > Administration > Troubleshoot > Troubleshoot File > Download.
Please, send me the troubleshoot via a Private Mesasage.
Also, it help us very much if you could share both IPSEC/L2TP configurations for Draytek and RUT240