When i type /reload, my map chash.

We do not have enough information to find the cause of this issue.

Please attach the crash report found in [minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/guides/finding-minecraft-data-folder] here.
If you cannot find a crash report, please attach the full launcher log found in [minecraft/launcher_log.txt|http://hopper.minecraft.net/help/guides/minecraft-logs/].

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https://paste.ubuntu.com/p/GJCh6QSNHF/

The world with the datapack:

https://drive.google.com/file/d/15OinIqT3T5XVIV3dyKhUpSX9oAfsdJtF/view?usp=sharing

I think, that the worldborder was crashing my world.

The ubuntu log you attached doesn't include a crash
From the video you uploaded I also don't see a crash, it just might be a loop in the datapack that never stops or the game still processing