Players crash when they enter the server.

OS: Linux
Server start: 2019-11-13 16:36:37 CST
Dmp timestamp: 2019-11-13 16:47:15 CST
Upload Date: 2019-11-13 16:47:15 CST
Session ID: bb00e1a7-2a81-4d64-bd20-e90ae0cb147f
Commit hash:
Build id: development
CrashReporter Key: e63f7593-ac85-3503-8f84-ca897801bd5e

Crash
[2019-11-13 16:47:15 INFO] at ChunkSource::getAvailableChunk[ChunkPos const&] (UnknownFile:?)
at BlockSource::getChunk[ChunkPos const&] const (UnknownFile:?)
at Actor::moveChunks[] (UnknownFile:?)
at Dimension::_tickEntityChunkMoves[] (UnknownFile:?)
at Dimension::tick[] (UnknownFile:?)
at Level::tick[] (UnknownFile:?)
at ServerLevel::tick[] (UnknownFile:?)
at GameSession::tick[] (UnknownFile:?)
at Minecraft::tickSimtime[int, int] (UnknownFile:?)
at Minecraft::update[] (UnknownFile:?)
at ServerInstance::_update[] (UnknownFile:?)
at clone (UnknownFile:?)
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>id</key>
<string>0</string>
<key>delay</key>
<integer>0</integer>
<key>status</key>
<integer>0</integer>
</dict>
</plist>