eisfeld

If someone has concerns about an election then what they should do is become election helpers or observers. See and check with their own eyes. If they find evidence of fraud then they can bring that forth. But just speculating because one doesn't like the election results only creates problems.

As Crossy said you should have a breaker that is responsible for the outside lights that you can open to take them out of the equation. And if that doesn't work then you can try the other breakers one by one and figure out that way which part of the circuit trips the RCBO. After that you probably need an electrician but you'll save him a lot of time by having narrowed down the search field. If it only trips when it rains then that's a good hint that the issue is somewhere outside.