Maybe it is an electrical connection related to cables or fuses. It should easy to figure out whether something like that is causing the problem.
You could try to use the steering column adjustments to move it on all directions just in case there is something wrong there and it can be released by movement.
Once mine would not be able to run the horn. I am not sure how that was blocked after readjusting the wheel but then I tried again and it worked.
Usually when batteries get old, they start causing all sort of problems. But I am not sure if you have a batter related side effect. You could check you battery health as well.