Information

Full output of /ess version:

[13:50:08] [Server thread/INFO]: Server version: 1.15.2-R0.1-SNAPSHOT git-Spigot-2f5d615-d07a78b (MC: 1.15.2)
[13:50:08] [Server thread/INFO]: EssentialsX version: 2.17.2.0
[13:50:08] [Server thread/INFO]: Essentials_WarpGUI version: 2.1
[13:50:08] [Server thread/INFO]: EssentialsXProtect version: 2.17.2.0
[13:50:08] [Server thread/INFO]: EssentialsXGeoIP version: 2.17.2.0
[13:50:08] [Server thread/INFO]: EssentialsXChat version: 2.17.2.0
[13:50:08] [Server thread/INFO]: EssentialsXAntiBuild version: 2.17.2.0
[13:50:08] [Server thread/INFO]: EssentialsXSpawn version: 2.17.2.0
[13:50:08] [Server thread/INFO]: EssentialsXXMPP version: 2.17.2.0
[13:50:08] [Server thread/INFO]: Vault is not installed. Chat and permissions may not work.
[13:50:08] [Server thread/INFO]: You are running unsupported plugins!

Server log: https://gist.github.com/Paplynkus5/95653a6863fa65923fa066312785e839
EssentialsX config: https://gist.github.com/Paplynkus5/93ec3d605451188085a5e4a5b67a28ba

Details

Description
Minecraft is black screen, no responding or server starts to bug out (only chat works, everything else is only clientside)

Steps to reproduce
To freeze a server: //regen (from WorldEdit (yes, I know that it is not an Essentials command, but console says that Essentials generated an exception while doing task 25021 or 25022 or 29028 or 24242)
To make a black screen: I don't know

Expected behavior
//regen - I expected it to regen a selection (console says that WorldEdit did it and exception occured after it - from client it looks like this too, but after restarting server //regen is undid)

for the second bug: I expected Minecraft to allow me to play

Screenshots

Like @JRoy mentioned, you should remove the EssentialsXXMPP jar file if you're not using it.

If you'd like to use GeoIP, you should visit this page for setup instructions. Otherwise, you can remove it along with XMPP.

You're using EssentialsGeoIP and EssentialsXXMP when you have no use for them. Remove those plugins.