1.12 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

If you have MixinBootstrap installed try removing it, it's a mod made to provide mixin support when Forge can't or doesn't... but it's not smart enough to disable itself when Forge DOES provide mixin support... and they conflict

1.12 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

Do you have Optifine installed? If so, remove it from your mods folder
If not, please provide debug.log (more info on where it is and how to provide it can be found in my signature below)

1.12 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

Your mods seem to be from repost sites, please check out the Stop Mod Reposts Project for information on why this is a bad thing

Yeah, usually AFK kicking is a server administration thing and is done for a reason... auto-reconnect defeats the purpose and on some servers might be considered cheating

If your issue is [0x10008]Cocoa: Failed to find service port for display it's not something we can fix, we have to wait for it to make its way down the chain through LWJGL and Mojang to us and it's unlikely to be backported

The practical uses for an auto-reconnect mod are sketchy at best imo, what do you need it for?

If you haven't made any changes to forge-common.toml, delete it from your config folder and let Forge re-generate the default

Forge 1.17 requires Java 16, your PC is attempting to use an older Java version instead

1.12 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

15 minutes ago, HxHL said:

com.electronwill.nightconfig.core.io.ParsingException: Invalid character 'T' after table entry "[loaderVersion]" = [36,)

Did you make a typo in your mods.toml?

Looks like an issue with Biomes You'll Go

A mod or datapack you have has broken worldgen settings, can't tell much more

"with out mode"? Do you mean "Without mods"?

You have duplicate mods installed, remember that Hwyla is a fork of Waila

server configs are per-world and are stored in the save

Please provide debug.log (more info on where it is and how to provide it can be found in my signature below)

Use Java 8 for 1.16.5 and earlier, also we don't support any docker images as far as I know

On 9/11/2021 at 1:13 PM, erw84 said:

With or without mods

10 hours ago, erw84 said:

It seems that forge doesn't work with the latest version of optifine.

So when you said "without mods"... you still had Optifine? Please note that Optifine is a mod, and quite an invasive one.

Please refer to Optifine's changelog for compatibility information, as it is on the closed-source project to be compatible with the open-source one, not the other way around.

Delete forge-client.toml from your config folder and try again

Because of the way Java's module system works you need to start the server with the provided bat(Windows) or sh(Mac/Linux) file.

After looking twice those timestamps are not the same, and it looks like onLeftClickBlock fires for both start AND continueDestroyBlock, try getting the blockstate's destroy progress in your handler to check

Looks like an issue with dungeonderps