Experiencing the same issue here. One example of the crash from the log:
hamachid crashed with SIGSEGV in tcache_get()
Unfortunately due to the password requirement on relaunch the setup cannot be left unattended and interrupts any connections in progress.
Please advise when a client version is released that is compatible with 20.04 LTS.
For anyone who is looking at this thread and in the same boat looking for a solution, I thought I would post my workaround here in case it helps anyone. This is on Ubuntu 20.04 LTS.
First things first I had to stop using Haguichi because it was the reason that there was a password prompt every time that Hamachi crashed. The Hamachi daemon would crash, Haguichi would attempt to restart it, but that would require a password to be entered before it could succeed.
Instead I got a utility called "Immortal" and set up the Hamachi daemon in one of its wrappers. With this it now starts the hamachid process as root during startup as well as monitors the hamachid pid file and restarts the daemon automatically every time it crashes. I tied this into a shell script so I could log every time it crashes, which as it turns out is a number of times per day.
While this is still not ideal, since every time it crashes and restarts it goes offline for a few seconds, at least it recovers on its own instead of remaining offline until a user manually intervenes. Looking forward to an update from Logmein but at least we're up and running in some capacity currently.