DaemonUmbra

It is the responsibility of the closed-source mod to adapt to the open-source mod, yes?

Have you tried removing Optifine?

Duplicate threads merged. 1.8.9 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

ShulkerToolTip is broken

Please read the Logs section of my signature below and provide the appropriate log in the appropriate manner.

Did you just come to the Forge forum to ask for help with Fabric?

Please don't do that again. Try running the game.

Please stop making us scroll from first post to last post, just post your new logs in a new response. Try deleting that file

Typically when someone says this they installed Java 8 but neglected to use that version. For Clients this is as simple as setting your installation's Java Version. For Servers you either need to replace the newer Java version with Java 8 in your system's path variable (global, affects every java program), or use the full path to the java 8 exe instead of simply invoking java (recommended, only affects this server)

Please provide updated logs

1.7.10 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

Is it truly random or is it a game of pick a name from piles A, B, and C, your item's name is now ABC

If you build the mod you could start up the regular client with it

You need to use Java 8 with Forge 1.12.2 and earlier

Not much you can do other than report it to the author

1.7.10 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

1.6.4 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

Please provide logs

I can't find a version of that mod for 1.12.2, where are you getting it?

Provide a new screenshot please

Can we get screenshots of the error instead of "Same Error"?

Threads Merged, user banned for piracy.

Wait a sec, is Liteloader serverside or client-only?

Try updating Forge and all your mods

You need to run 1.12.2 and earlier with Java 8, that error happens when you run with Java 9 or above Edit: Merged duplicate threads, please do not double post