When I export the mod to .jar and run it in my Original Minecraft 1.16.4, it doesn´t works.

I created a small mod just for me Vanilla_DLC on version 1.16.4. When I export it to .jar and run it in my minecraft, it reports that there is a problem.
Here is the log:

[10Led2021 16:06:19.236] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--username, InfiniteCapacity, --version, 1.16.4-forge-35.1.4, --gameDir, C:\Users\uzivatel\AppData\Roaming\.minecraft, --assetsDir, C:\Users\uzivatel\AppData\Roaming\.minecraft\assets, --assetIndex, 1.16, --uuid, 91718b94230b41f8b55d302b44441784, --accessToken, ????????, --userType, mojang, --versionType, release, --launchTarget, fmlclient, --fml.forgeVersion, 35.1.4, --fml.mcVersion, 1.16.4, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20201102.104115]
[10Led2021 16:06:19.240] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 8.0.6+85+master.325de55 starting: java version 1.8.0_51 by Oracle Corporation
[10Led2021 16:06:19.254] [main/WARN] [cpw.mods.modlauncher.SecureJarHandler/]: LEGACY JDK DETECTED, SECURED JAR HANDLING DISABLED
[10Led2021 16:06:19.634] [main/INFO] [net.minecraftforge.fml.loading.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[10Led2021 16:06:19.675] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.2 Source=file:/C:/Users/uzivatel/AppData/Roaming/.minecraft/libraries/org/spongepowered/mixin/0.8.2/mixin-0.8.2.jar Service=ModLauncher Env=CLIENT
[10Led2021 16:06:21.178] [main/INFO] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Launching target 'fmlclient' with arguments [--version, 1.16.4-forge-35.1.4, --gameDir, C:\Users\uzivatel\AppData\Roaming\.minecraft, --assetsDir, C:\Users\uzivatel\AppData\Roaming\.minecraft\assets, --uuid, 91718b94230b41f8b55d302b44441784, --username, InfiniteCapacity, --assetIndex, 1.16, --accessToken, ????????, --userType, mojang, --versionType, release]
[10Led2021 16:06:26.294] [Render thread/INFO] [com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService/]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'