We are also having this issue for some players on our server but not all players. This is the error I pulled from my logs when it happened to me .
Log C:\Users\Joe\Documents\DayZ\Profile\crash_2019-10-16_21-24-41.log started at 16.10. 21:25:20



------------------------------------
TACOSRIG, 16.10 2019 21:25:20
NULL pointer to instance
Class: 'HordeConfig'
Function: 'getHordeZoneLocation'
Stack trace:
InfectedHordesPlus/4_World/plugins\hordeconfig.c:84
InfectedHordesPlus/4_World/plugins\pluginbase\infectedhordespawner.c:38
scripts/3_Game/tools\tools.c:600
scripts/3_Game/tools\tools.c:289
scripts/3_Game/tools\tools.c:404
scripts/3_Game/dayzgame.c:2335

Runtime mode
CLI params: name Taco doLogs profiles C:\Users\Joe\Documents\DayZ\Profile noPause mod F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@CF;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@DayZ-Expansion-Notifications;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Code Lock;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@ZomBerry Admin Tools;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Dayz Navigation;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Unlimited Stamina;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@BuildAnywhere;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@[CrSk] BMW 525i E34;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Airdrop-Upgraded;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Gerphelius Zil-130;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Server_Information_Panel;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Trader;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@PsychoDayZ Nissan_Skyline_GTR_BNR34;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Base Furniture Mods 2.0;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@iBackpacks;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@No Shoe Damage;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@TougherBasesV2;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Zeroy-FishingZ;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@SIX-DayZ-Auto-Run;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@MoreGuns;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@UsefulSuppressors;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@DayZ-Expansion-Chat;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@VanillaPlusPlusMap;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@InfectedHordesPlus;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@WeaponReduxPack;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@TraderEconomy - Dynamic prices;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Simple Base;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Base_Storage;F:\SteamLibrary\steamapps\common\DayZ\!Workshop\@Forever_Burning_Campfire

It crashes on the DayZ menu. If I am quick enough and can click on play before the crash, it will let me in and plays fine. The hordes are awesome. Thank you for your amazing work. Just wanted to give you all the info I have.

hope this will be fixed, because we really want this mod on our server

Keep on checking if this mod been updated. Really want it fixed and added to our server.

Updated, also regenerate configuration files, as they have been changed.