I created a minecraft server in 1.15 and it actually worked at the beginning, but today the server closes again immediately after opening
What is the error message?
What is this server? Rented, bought, Aternos or hosted yourself? Which version is running on the server? Vanilla, Forge, Spigot,?
Don't answer: /
Have hosted it myself, is a normal vanilla server at 1.15
Maybe too little RAM or space? Give it a try with more RAM.