We unfortunately do not offer the option to roll back to prior versions of Roon in this instance. You can read more about this update here:
If you are not able to access the Trigon’s admin interface or OS in any way, even via SSH or a web UI as @connor has mentioned above, you’ll want to get in touch with Trigon directly, and as them if the Trigon is running an embedded Linux with a kernel or glibc version below what 1653 now requires.