OK, thanks for the replay! 
Seems like there is already an open issue on github as well:
[BUG] Cant access com.victronenergy.battery.socketcan_* from VICTRON MODBUS NODE #205
others seem to have similar issues:
https://community.victronenergy.com/t/node-red-errors-and-does-not-start-up-anymore/25308
Is there anywhere a changelog for the beta versions to check if this issues has been addressed and if it is worth giving the new version a try?