The version is 1.12.2 (ik it's not supported, but I think it's not a very difficult problem). Basically the server crashes on startup and it doesn't leave any crash log. I tried with both 14.23.5.2859 and 14.23.5.2860 and it happens the same.
Hello, I was creating a server in Aternos with Forge 1.12.2 (14.23.5.2859) and it crashes (also crashes in every computer), here there's a link to the log:
https://mclo.gs/hzP1R8x