We have received similar reports and some of the issues causing this are already internally resolved. The workaround is to either remove/hide the problematic object(s) or to go to Edit > Scene Settings > Scene > Execution and disable “Expression”.
This case is now reported for our devs under the ID (CC4D-1430).
To anyone experiencing the original problem reported in this thread - Cinema 4D freezing as soon as interactive rendering is started: