Cannot join. The following event are not identical between you and the server. This indicating the following mod are not multiplayer safe

mod-enemyracemanager

Did it say which event? May you post your logs as well? Both client and server if you have access to server log.

I may also need your server save to test it as well.

I guess you mean this. This is from my client.

636.901 Error ClientMultiplayerManager.cpp:1094: mod-enemyracemanager was registered for the following nth_ticks when the map was saved but has not re-registered them as a result of loading: 181
636.901 Error ClientMultiplayerManager.cpp:85: MultiplayerManager failed: "" + multiplayer.script-event-mismatch + "
" + "
mod-enemyracemanager"
636.901 Info ClientMultiplayerManager.cpp:607: UpdateTick(2792049) changing state from(ConnectedLoadingMap) to(Failed)
864.234 Info ClientMultiplayerManager.cpp:198: Quitting multiplayer connection.
864.234 Info ClientMultiplayerManager.cpp:607: UpdateTick(2792049) changing state from(Failed) to(Disconnected)
864.234 Info ClientMultiplayerManager.cpp:216: Deleting active scenario (global = true).
864.819 Info UDPSocket.cpp:233: Closing socket
864.819 Info UDPSocket.cpp:263: Socket closed
864.950 Warning Commander.cpp:211: Enemy entities with auto place controls 'enemy-base' on surface 'nauvis' have different collision masks. Enemy expansions may not work properly. Entities: enemy--small-worm-turret--1, small-worm-turret, enemy--medium-worm-turret--1, medium-worm-turret, big-worm-turret, enemy--big-worm-turret--1, behemoth-worm-turret, enemy--behemoth-worm-turret--1, biter-spawner, enemy--biter-spawner--1, enemy--spitter-spawner--1, spitter-spawner, enemy--roboport--1
866.032 Info HttpSharedState.cpp:55: Downloading https://mods.factorio.com/api/mods?page_size=max&full=True&version=2.0.23&lang=en&is_space_age=true

Sorry, the server log was overwritten. I will update if I see it again. Currently, after upgrading the server and client ERM mod to the newest the problem temporarilly gone.

https://drive.google.com/file/d/1ampLXIoYJlSusnq-A4qrQFPAjUvEqgxl/view?usp=drive_link

https://drive.google.com/file/d/1VTWt2lkoFptt1kM0CZjw-DFk5WThkpws/view?usp=drive_link

ERM2012 is the save several hours ago with ERM 2.0.12 before I cannot join the server. However, it is not the save right before I cannot join the sever, Sorry I dont have the save right before that.
ERM2013 is the save after upgrading to ERM 2.0.13 and all problems are gone.

I found the issue based on the log. It's from army deployer

I pushed a fix as 2.0.14. That should prevent it to happen in future. :fingercross:

Thanks for the report.

Great! Thanks.