DaemonUmbra

When you say it hangs, how long have you waited before killing it?

Please read the Logs section of my signature below and provide the appropriate log in the appropriate manner.

Are you using the Twitch Client?

Remember you need to restart anything using that variable after changing it, so any Terminal Windows or IDEs

Is this about how long ago you installed Twitch? This is a known TWITCH issue that they ignore the Forge logging configuration that creates the debug.log and launching Forge 28.1.70 myself I see a debug.log being generated.

If you're using Twitch please follow the instructions I have specifically for Twitch

That's not the file I want. Please read my signature.

Please read the Logs section of my signature below and provide the appropriate log in the appropriate manner.

Improving Minecraft is broken and has a bad name and mod ID.

1.8.9 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

Please provide your code in a GitHub repo

You didn't delete or rename the vanilla server jar did you?

Try the latest version

That's is literally the most popular repost site, stop using it.

Please provide the server's debug.log

The filenames of one or more of your mods suggests you got them from a repost site. Please read up on the StopModReposts project (link in my signature) for info on why this is a bad thing.

In that case, locking. Learn Java

Do you know Java or any other programming language?

Have you tried the most recent version of Forge?

We know virtually nothing about Optifine here as it is a closed-source mod, you'd be better off asking in Optifine's Discord I think

1.8.9 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

OreSpawn's config is invalid

1.7.10 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

This is sounding like you want your block to sustain fire but not be consumed by fire.

Have you tried a fresh copy or different version of the installer?