DaemonUmbra

1.8 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

I would recommend doing the last line in your mod constructor If you're already doing that, show your full class

Please provide debug.log (more info on where it is and how to provide it in my signature below, just expand the spoiler)

Update Forge to 1.16.5-36.1.18 or later

Please provide debug.log (more info on where it is and how to provide it in my signature below, just expand the spoiler)

Provide the save please

Wow... all this time I thought it was a Java thing

I don't know which profiler you installed, so how could I possibly know how to use it... please look at the documentation or quick start guide or whatever for the profiler you installed

Remove all resource packs and data packs, if you haven't made any config changes delete the config folder

Remove Blame, try again. If it's still an issue provide debug.log

1.8 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

To us, this reads like "I'm not asking for support, but I'm asking for support"

No... just take your mods and move half somewhere else run the game if the issue still occurs, repeat. if not, repeat with the other group of mods

Have you looked up what a Binary Search is or are you assuming it's some kind of autofix mod?

Look up "Binary Search", it will speed up the process for finding the offending mod

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Does this happen without Optifine? If not then it's not a Forge issue and the Optifine people need to stop blaming the open-source project for the bugs in their closed-source project.

Your PC username is invalid for use with Java

That's not debug.log, that's a copypaste from the game output window

There are free options...

iirc you listen to one of the gui render events and (after some checks of the phase and such to make sure it's the health bar being rendered at that moment) set it to cancelled to skip vanilla's rendering of it

Please provide debug.log for both client and server

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Delete C:\Users\kikis\AppData\Roaming\.minecraft\config\fml.toml and try again

Full installer log please?