https://pastebin.com/cg0PNtsM

After talking with several individuals, and going over their mods, if it was mentioned in the crash reports I was getting or not, some had concluded it was requiem. I am going to post this error here, just in case.

Quilt's reply :

We don't support fabric impl classes because you shouldn't be using them anyway

so the quilt loader isn't compatible with some fabric classes.

The solution here is to either not use quilt to load these fabric mods

Issues stopped, but another mod struck. I will generate new logs later.

AbsolemJackdaw/HangMan#11

Also, I’m posting this here on request of the owner of that repo

I've got a contact point at lady snake, i'll see if i can get them to join or answer

Did you delete Requiem and the issues stopped?

What actions caused the crash to happen? According to the report it's an issue with Terrablender that involves mod initialization, but I don't know if that means it crashed on startup or on world load.

Startup

So the next steps are to try different mod combinations and find out which mods are actually causing the issue.

quilt doesnt support Fabrics impl package. anything used from fabric.impl will not load on quilt.
any fabric mod that uses anything from it will crash on quilt

@Eman-3600 Might want to read Artix's reply

So it's not a Requiem bug? Cuz then you should close it.

it may be, if Requim wishes to be compatible with Quilt, it should omit using anything from the net.fabricmc.fabric.impl package

Requiem definitely isn't a problem on its own. It's made for Quilt as of its update to 1.19 and works fine on its own. What I don't know is if you guys have tested if this is a problem with Requiem or a problem with Quilt, because if it's a Quilt problem rather than a Requiem problem this issue should be closed.

ah, that i do not know. i come from a whole line of issues linked to my mod, and most mods all were for fabric, which has this issue.
i have no clue on the rest. this may as well be out of your scope, and may be linked to the other fabric mods messing up the loading of the game.

One mod reports however their problems got solved removing requiem from their mod list. may as well be worth taking a look what mods with and why

Well, after updating to 1.19.1, I have to wait on other mods to fix some of their files as well, before I can come back to testing here. Since I can't test if mods are not properly marked/updated for 1.19.1.