After the game is updated, I cannot run my server

Once a new version of the game is available, you have to update the server as well. To do that, just delete the "server.jar" file and the "lib" folder in your server directory, then download the latest server version, and move the new "server.jar" and "lib" folder into your server dir.

Alternatively, if you have to Steam version of Rising World, you can use the Steam RW server, which downloads updates automatically. You find the server in your Steam library under "Tools"