Starts but then stops

I click start, it says it's starting, and then after a while it goes to stopping and goes back to offline. The server never actually starts.

The software is Technic Tekxit 2.21 and the launcher for minecraft is the technic launcher.

I had an issue before where I would be able to start the server and have my friends and I join and play for a few minutes, but then it kicks everyone off and goes offline. Before I could even fix that issue, it changed to the current issue above.

Here is the log: https://mclo.gs/qDerBYb

So, I have multiple backups for the world. I used the most recent one and my friends and I are able to play, but from time to time the server will just stop, so I would need to start up the server again and we could play again. So I have two questions.

1. Will any backup that I made for the server eventually all lead to it being unplayable

2. How can I fix the problem of the server kicking us off from time to time and going offline?

https://mclo.gs/oFljozK

This is the log just after the server went down for some reason.

After this occurs, the screen just says "Timed Out" and theres a button on the bottom to go to the main menu.

Here's another log of the server able to start, playing for a while, then stopping.

https://mclo.gs/fqjRYi2

I'm not sure if that's the issue. The server is able to be online, and we are able to play. It's just that sometimes it crashes. The time the server becomes online and the time it takes for it to crash varies a lot. Sometimes the server is completely fine and we can play from start to finish without the server stopping.