version used: map_atlases-1.21-6.1.2-neoforge.jar

The server does not start with the mod, but it is required when trying to join with the mod installed only on the client side.

server log:

Failed to start the minecraft server

net.neoforged.fml.ModLoadingException: Loading errors encountered:
- Map Atlases (map_atlases) encountered an error while dispatching the net.neoforged.neoforge.registries.RegisterEvent event
java.lang.RuntimeException: Attempted to load class net/minecraft/client/multiplayer/ClientLevel for invalid dist DEDICATED_SERVER

client side log:

[10Mar2025 06:46:36.350] [Render thread/WARN] [net.neoforged.neoforge.client.gui.ModMismatchDisconnectedScreen/]: Channel [map_atlases:world_hash] failed to connect: Channel of mod "Map Atlases" failed to connect: This channel is missing on the server side, but required on the client!
[10Mar2025 06:46:36.350] [Render thread/WARN] [net.neoforged.neoforge.client.gui.ModMismatchDisconnectedScreen/]: Channel [map_atlases:debug_update_map] failed to connect: Channel of mod "Map Atlases" failed to connect: This channel is missing on the server side, but required on the client!
[10Mar2025 06:46:36.350] [Render thread/WARN] [net.neoforged.neoforge.client.gui.ModMismatchDisconnectedScreen/]: Channel [map_atlases:open_atlas_screen] failed to connect: Channel of mod "Map Atlases" failed to connect: This channel is missing on the server side, but required on the client!
[10Mar2025 06:46:36.350] [Render thread/WARN] [net.neoforged.neoforge.client.gui.ModMismatchDisconnectedScreen/]: Channel [map_atlases:select_slice] failed to connect: Channel of mod "Map Atlases" failed to connect: This channel is missing on the server side, but required on the client!
[10Mar2025 06:46:36.350] [Render thread/WARN] [net.neoforged.neoforge.client.gui.ModMismatchDisconnectedScreen/]: Channel [map_atlases:remove_map] failed to connect: Channel of mod "Map Atlases" failed to connect: This channel is missing on the server side, but required on the client!
[10Mar2025 06:46:36.350] [Render thread/WARN] [net.neoforged.neoforge.client.gui.ModMismatchDisconnectedScreen/]: Channel [map_atlases:remove_marker] failed to connect: Channel of mod "Map Atlases" failed to connect: This channel is missing on the server side, but required on the client!
[10Mar2025 06:46:36.350] [Render thread/WARN] [net.neoforged.neoforge.client.gui.ModMismatchDisconnectedScreen/]: Channel [map_atlases:place_marker] failed to connect: Channel of mod "Map Atlases" failed to connect: This channel is missing on the server side, but required on the client!
[10Mar2025 06:46:36.350] [Render thread/WARN] [net.neoforged.neoforge.client.gui.ModMismatchDisconnectedScreen/]: Channel [map_atlases:take_atlas] failed to connect: Channel of mod "Map Atlases" failed to connect: This channel is missing on the server side, but required on the client!
[10Mar2025 06:46:36.350] [Render thread/WARN] [net.neoforged.neoforge.client.gui.ModMismatchDisconnectedScreen/]: Channel [map_atlases:teleport] failed to connect: Channel of mod "Map Atlases" failed to connect: This channel is missing on the server side, but required on the client!
[10Mar2025 06:46:36.366] [Render thread/WARN] [net.minecraft.client.multiplayer.ClientCommonPacketListenerImpl/]: Client disconnected with reason: Incompatible client! Please use NeoForge 21.1.128