Hi, following is the log on the server. I am not the player who triggered crash so I am not sure what exactly happened.

257261.068 Script @hextorio/api/gui/trade_overview_gui.lua:661: set input filter to crude-oil-barrel
257477.069 Error MainLoop.cpp:1468: Exception at tick 5059909: The mod Player Recycling (Quality Players) (1.0.4) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event player-recycling::on_gui_click (ID 1)
Unknown item name: player-recycling-character-15
stack traceback:
[C]: in function 'can_insert'
player-recycling/control.lua:107: in function <player-recycling/control.lua:17>
257477.069 Error ServerMultiplayerManager.cpp:84: MultiplayerManager failed: "The mod Player Recycling (Quality Players) (1.0.4) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event player-recycling::on_gui_click (ID 1)
Unknown item name: player-recycling-character-15
stack traceback:
[C]: in function 'can_insert'
player-recycling/control.lua:107: in function <player-recycling/control.lua:17>"
257477.069 Info ServerMultiplayerManager.cpp:808: updateTick(5059909) changing state from(InGame) to(Failed)

NVM, confirmed that was caused by more than 8 players in the server.

Oh man I was hoping nobody would run into this and that 8 was a fine maximum for my hyper-jank implementation. For the time being this is unsupported due to my incompetence.