This is fantastic... this error is coming out of Forge's error screen so the thing that's trying to tell you what went wrong is going wrong and covering the original error.
Backdate to 33.0.55 and try again, we'll see if the log is sensible.
That is still not debug.log
It’s worth noting that Twitch screws up Forge’s logging configurations causing debug.log to not generate.
Also if you are using Windows do note that Explorer hides file extensions by default, so the log might show as just “debug”
...what?
If it's on your local PC connect using "localhost" as the IP... and don't touch the server-ip field in server.properties unless you have an advanced network setup, it will auto-detect on startup if you leave it blank
Make servers out of what? I'll never understand what's so advanced about making a server that people need a tutorial for it.
Did you rename or move any of the files?
RFTools needs McJtyLib... which you don't have and RFTools doesn't indicate the dependency in its mods.toml so Forge can't show a meaningful error screen
Windows hides file extensions by default, it's stupid.
That file that's showing as "debug"? That's debug.log... all the other files showing as .log are actually .gz files