I have no idea what I did wrong. I went exploring to find a mesa biome to get some red sand.
And now my server contantly crashes until I teleported myself to the spawn using the server console in the small time window I have.
I hope the crash report helps!
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This is the server watchdog
Description: Watching Server
which kicks in because the server runs out of memory:
Memory: 1370375216 bytes (1306 MB) / 1970274304 bytes (1879 MB) up to 1970274304 bytes (1879 MB)
JVM Flags: 2 total; -Xmx2048M -Xms2048M
Maybe this is a similiar issue like MC-129492.
Assign more RAM and report if the issue is persising.