For the benefit of everyone else reading this discussion who doesn't speak Swedish... here's what I got from a good (paid) translation service:

"Force majeure typically refers to war, riots, fire, natural disasters (such as floods, hurricanes, earthquakes), explosions, strikes, new laws prohibiting the fulfillment of the contract, and similar events."

The thing is though, Tesla isn't suing because their license plates aren't being delivered. They are suing because it was* literally impossible for them to access an essential government service.

(* was, because Tesla has won a preliminary decision forcing the state to allow Tesla to arange an alternative delivery method - probably Tesla sending someone around to the factory to pick up the plates)

In my opinion Force Majeure would only be a valid defence if it was the number plate factory workers who went on strike, but that's not what happened. The number plates are there, ready to go, and the state refused to allow Tesla to access them.

Force Majeure is not a blanket blanket right to do whatever you want. It only defends you in cases where you had no reasonable alternative available due to the strike.

I'm reminded of a time when flooding closed a railway line that I'd bought tickets for... the railway company didn't argue force majeure and cancel everyone's booking. They hired a dozen busses. You have an obligation to find a reasonable solution if the service you'd normally provide isn't possible.

In my case, the train service was 100% aware that they had a low bridge over a river that floods whenever there is heavy rain and therefore they couldn't argue that it was an unforeseen event. They would have been liable, not only for the cost of the train ticket, but also for any other damages/etc suffered by someone who was suddenly unable to get where they needed to go (booking a flight or regular bus wasn't possible, those don't have enough spare capacity for an entire train full of people). In this case, there is a perfectly reasonable and zero cost alternative to having license plates delivered by their usual method, and they can't refuse to use that alternative.