Hi,
Please try the following indications:
1. Configure a manual route for the network 192.168.1.0/24 and assign it to the RUT955 on the RMS VPN configuration. (This will let you ping the LAN IP interface of the router)
2. Disable the firewall protection on your LAN-connected PC (192.168.1.120), and if it has a static IP address configured, please check that it has the correct default gateway configured. (It is highly probable that your PC Firewall is blocking the ICMP traffic originated from the RMS-VPN)
After following the steps above, verify if you can ping from your laptop connected to the RMS VPN to the router LAN IP address interface: 192.168.1.1, and the PC IP address 192.168.1.120.
I will be waiting for your comments.
Regards.