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Do you play with a modpack? If yes, which one.
Could you please also share the log with us using the share button on https://aternos.org/log
This is the reason why your server stops: https://mclo.gs/dbFArzp#L21
Do you have a new world?
Then it's probably a problem with the world.
actually im having the same issue with the fool craft mod pack but instead of it saying "Starting" for a few seconds its a got 5 - 10 mins
there is no sollution 
i downloaded the world and tried playing it, turns out the world is corrupted
(most likely due to the Aternos crashing every half an hour)
there is no sollution
(most likely due to the Aternos crashing every half an hour)
no, not really.
I have the same problem.Thought,I only don't have any modpacks or mods just a lot of plugins it can handle.I downloaded a server spawn.
