When someone join my server it crashes

When someone joins my server it closes i have no idea what to do!
Here are the logs: https://mclo.gs/QlHxlmc

After i join it stays open but after minute it crashes and says that it was overloaded

Hay @danyuzunov

What specs is your server running on? Are you running this on your own PC? You may need to allocate it more RAM

Please get back with that info and I can see if I can help!