I update mod 2.1.1 from 2.0.1,then i can't join the server.But if use 2.01 can normal join server no problom.

This is server logs:
[10:15:21] [Server thread/INFO] [ne.mi.co.AdvancementLoadFix/]: Using new advancement loading for net.minecraft.advancements.PlayerAdvancements@2186e928
[10:15:21] [Server thread/INFO] [minecraft/PlayerList]: Edel_Lilies[/127.0.0.1:63368] logged in with entity id 234 at (-945.6220335497983, 65.0, 577.9524893759511)
[10:15:21] [Server thread/INFO] [minecraft/DedicatedServer]: Edel_Lilies joined the game
[10:15:21] [Server thread/WARN] [minecraft/EntityDataManager]: defineId called for: class its_meow.betteranimalsplus.common.entity.EntityFreshwaterEel from class dev.itsmeow.betteranimalsplus.imdlib.entity.EntityTypeContainer
[10:15:21] [Server thread/WARN] [minecraft/EntityDataManager]: defineId called for: class its_meow.betteranimalsplus.common.entity.EntityFreshwaterEel from class dev.itsmeow.betteranimalsplus.imdlib.entity.util.EntityTypeContainerContainable
[10:15:22] [Netty Server IO #3/ERROR] [minecraft/ArgumentTypes]: Could not serialize zmaster587.advancedRocketry.command.StarArgument@58b564e6 (class zmaster587.advancedRocketry.command.StarArgument) - will not be sent to client!
[10:15:22] [Netty Server IO #3/ERROR] [minecraft/ArgumentTypes]: Could not serialize zmaster587.advancedRocketry.command.ReflectionArgument@70af7cd (class zmaster587.advancedRocketry.command.ReflectionArgument) - will not be sent to client!
[10:15:22] [Netty Server IO #3/ERROR] [minecraft/ArgumentTypes]: Could not serialize zmaster587.advancedRocketry.command.ReflectionArgument@5f22814f (class zmaster587.advancedRocketry.command.ReflectionArgument) - will not be sent to client!
[10:15:22] [Netty Server IO #3/ERROR] [minecraft/ArgumentTypes]: Could not serialize greekfantasy.deity.DeityArgument@24428941 (class greekfantasy.deity.DeityArgument) - will not be sent to client!
[10:15:22] [Netty Server IO #3/ERROR] [minecraft/ArgumentTypes]: Could not serialize greekfantasy.deity.DeityArgument@665a5e6c (class greekfantasy.deity.DeityArgument) - will not be sent to client!
[10:15:22] [Netty Server IO #3/ERROR] [minecraft/ArgumentTypes]: Could not serialize greekfantasy.deity.DeityArgument@24b982ed (class greekfantasy.deity.DeityArgument) - will not be sent to client!
[10:15:22] [Netty Server IO #3/ERROR] [minecraft/ArgumentTypes]: Could not serialize greekfantasy.deity.DeityArgument@1713fba (class greekfantasy.deity.DeityArgument) - will not be sent to client!
[10:15:22] [Netty Server IO #3/ERROR] [minecraft/ArgumentTypes]: Could not serialize zmaster587.advancedRocketry.command.ReflectionArgument@13679f0e (class zmaster587.advancedRocketry.command.ReflectionArgument) - will not be sent to client!
[10:15:22] [Netty Server IO #3/ERROR] [minecraft/ArgumentTypes]: Could not serialize zmaster587.advancedRocketry.command.ReflectionArgument@531a9b90 (class zmaster587.advancedRocketry.command.ReflectionArgument) - will not be sent to client!
[10:15:22] [Server thread/WARN] [minecraft/EntityDataManager]: defineId called for: class its_meow.betteranimalsplus.common.entity.EntityLamprey from class dev.itsmeow.betteranimalsplus.imdlib.entity.EntityTypeContainer
[10:15:22] [Server thread/WARN] [minecraft/EntityDataManager]: defineId called for: class its_meow.betteranimalsplus.common.entity.EntityLamprey from class dev.itsmeow.betteranimalsplus.imdlib.entity.util.EntityTypeContainerContainable
[10:15:22] [Server thread/WARN] [minecraft/EntityDataManager]: defineId called for: class its_meow.betteranimalsplus.common.entity.EntityCoyote from class dev.itsmeow.betteranimalsplus.imdlib.entity.EntityTypeContainer
[10:15:23] [Server thread/INFO] [structurize/]: New Server UUID 9bce12a4-69fb-46bf-b5a1-ec909122bafd
[10:15:23] [Server thread/INFO] [co.si.sh.ev.CommonEvents/]: []
[10:15:23] [Server thread/INFO] [Waila/]: Syncing config to Edel_Lilies (5fe3a1c1-4549-38dd-9caa-a0592ff2b3e8)
[10:15:23] [Quark Contributor Loading Thread/ERROR] [quark/]: Failed to load patreon information
java.net.UnknownHostException: raw.githubusercontent.com
at java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[?:1.8.0_301]
at java.net.PlainSocketImpl.connect(Unknown Source) ~[?:1.8.0_301]
at java.net.SocksSocketImpl.connect(Unknown Source) ~[?:1.8.0_301]
at java.net.Socket.connect(Unknown Source) ~[?:1.8.0_301]
at sun.security.ssl.SSLSocketImpl.connect(Unknown Source) ~[?:1.8.0_301]
at sun.security.ssl.BaseSSLSocketImpl.connect(Unknown Source) ~[?:1.8.0_301]
at sun.net.NetworkClient.doConnect(Unknown Source) ~[?:1.8.0_301]
at sun.net.www.http.HttpClient.openServer(Unknown Source) ~[?:1.8.0_301]
at sun.net.www.http.HttpClient.openServer(Unknown Source) ~[?:1.8.0_301]
at sun.net.www.protocol.https.HttpsClient.(Unknown Source) ~[?:1.8.0_301]
at sun.net.www.protocol.https.HttpsClient.New(Unknown Source) ~[?:1.8.0_301]
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source) ~[?:1.8.0_301]
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source) ~[?:1.8.0_301]
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source) ~[?:1.8.0_301]
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source) ~[?:1.8.0_301]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source) ~[?:1.8.0_301]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) ~[?:1.8.0_301]
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source) ~[?:1.8.0_301]
at java.net.URL.openStream(Unknown Source) ~[?:1.8.0_301]
at vazkii.quark.base.handler.ContributorRewardHandler$ThreadContributorListLoader.run(ContributorRewardHandler.java:144) [quark:r2.4-316]
[10:15:23] [Server thread/WARN] [minecraft/MinecraftServer]: Can't keep up! Is the server overloaded? Running 2331ms or 46 ticks behind
[10:15:23] [Server thread/WARN] [minecraft/EntityType]: Skipping Entity with id
[10:15:23] [Server thread/INFO] [minecraft/ServerPlayNetHandler]: Edel_Lilies lost connection: Internal Exception: io.netty.handler.codec.EncoderException: java.lang.IllegalStateException: Modders must implement Ingredient.getSerializer in their custom Ingredients: org.infernalstudios.infernalexp.init.IEBrewingRecipes$IngredientWrapper@274081d7
[10:15:23] [Server thread/INFO] [minecraft/DedicatedServer]: Edel_Lilies left the game
[10:15:23] [Server thread/WARN] [minecraft/EntityType]: Skipping Entity with id

fixed in 46f1b99

Is the server also using 2.1.1?

ill look into this

Yes,they're also using 2.1.1. My clinet and server also is Forge 36.2.2.
It is my modlist modlist.txt