DaemonUmbra

Take off the .js and it works, it's an embed code Seeing a lot of warnings regarding your items and blocks being registered with the "tutorial" prefix as opposed to your mod id of "tutorialmod", and other warnings that I believe share this root issue. I see you're using some sort of ItemBase, which is frowned upon. Which tutorial are you following?

Please keep this forum in English. MinecraftForge is for the Java Edition of Minecraft, not the Windows 10 or Bedrock Editions.

I don't even see anything about the server watchdog, which is what kills it if that happens... there aren't any hs_err_pid files in the server are there?

Sounds like you don't have Java installed, and please be patient

Assuming he's not using Twitch it will be in .minecraft/logs

Can you provide debug.log of both the server and the client trying to connect?

1.8 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Neither of these show a crash, can you be more specific about what you mean by "crashes"?

If you open a command prompt or terminal with admin privileges and run sfc /scannow, what does it say? (SFC is a Windows Utility that checks for corruption in system files)

This is a crash report, not debug.log

What version of Minecraft are you using?

Please provide debug.log (info on where it is and our preferred methods of providing it in the "Logs" section of my signature below)

Delete /Users/ben/Library/Application Support/minecraft/libraries/net/minecraftforge/forge/1.16.3-34.1.0/ and reinstall Forge

Please provide debug.log (info on where it is and how to provide it are in the "Logs" section of my signature below)

JavaScript and Java are nothing alike. Their only similarity is both were named by people who wanted to invoke the image of coffee with the name of their language.

You're starting a vanilla server there... if you want to run a Forge server you need to run the Forge jar

How are you starting the server? Using what file?

Learn Java before modding, do not learn Java by modding.

You still have more waterlogging installed and autumnity requires abnormals core, remove them

I'm afraid there's only so much I can do when I can't look into your network setup myself. As long as your ports are forwarded, your firewall is allowing packets incoming and outgoing on 25565 (and you haven't set the server to use a different port) you should be good.

You haven't done anything like setting the IP in server.properties, have you? That should be left blank

Is your firewall set to let Java through?

Your router didn't reset or anything, right?

Do you have a static IP? That's typically a service you have to pay extra for nowadays.

Did you do the port forwarding procedure with your router? Are you sure you did it correctly?