How to execute an event on the server from the client?

This is not supported directly, but you may be able to achieve a similar result with two replicated events that work together:

  1. A multicast event that performs the logic to be done on the server and the clients.
  2. A “Run on Server” event, that simply calls the multicast event from #1.

Now you should be able to call event #2 from any client, and when the server receives it, it will multicast event #1 back to all the clients.