I advise to check not only if Twinmotion is up to date and that you are using the latest version of the Twinmotion plug-in, but check also Windows for updates. It is worth it to check as well if any Firewall or Anti-virus program is blocking the connection between Archicad and Twinmotion. Also, something else important to know is that Twinmotion needs to be opened at least once before trying to do a synchronization.
I hope it helps you solve the problem!
If the issue persists with everything up to date and unblocked, I'd like to suggest to reach out to your local support since it might need some further investigation. Please make quick video footage, if possible, so that support can take a look, showing the issue itself and the plugin version number found in the “About” under the Twinmotion menu inside Archicad.