Same issue. I have 8 remote users connected VPN but new connections fail with error "remote connection terminated because the remote computer failed to respond in a timely manner". I have recreated the use id for client vpn and tried it from multiple location in the Dallas area. Spectrum is the internet provider.
I followed the Community dashboard on the status of the fix. My clients are telling me now that they can connect using the Client VPN on the MX67's router/firewalls. So, it looks like it is fixed. Thanks to the Cisco Engineers.