Minecraft Server is not working. What should I do?

I want to play with mods on a Minecraft server with my friends. Since we don't want to buy one and the free servers are not an alternative, we (or I) would like to run the server on my PC.

I looked for a tutorial and then found this one:

I then looked at it and did everything exactly as he said it would. But from minute 20 when I wanted to start the server with my mods and my world, I could neither join the server nor the console accepted the stop command: (picture attached)

Now I want to ask you if you can help me. If it's easier to loosen, here's my Dc Tag: Pyrobanane # 9361

The Mod Controllable is a client mod that can't be installed on a server.

Attempted to load class com / mrcrayfish / controllable / client / ControllerInput for invalid side SERVER

Are you sure that the mod also works on the server side?

Oh, I probably forgot to remove it. Stupid of me.

It's due to a mod called controllable.

Is only for clients

Thank you so stupid of me to leave the inside.

Hi, can you help me again please have a problem I did it like this:

But my friends can't join.