Yeah I'm getting this issue also - only for Barbarian as far as I can tell.

edit - looks like cleric is an issue at the moment also.

still broken trying to make Wraith LOTR shadow of war subclass

Still broken...rogue too. This seems like something that shouldn't exist in 2025. Anyone have an alternative platform? This site and support has gone down the drain.

Here to also report the error when trying to make a rogue subclass. Disappointed to see this isn't a new problem and nobody seems to care?...

Strange the error for me is only the barbarian subclass

Okay, specific workaround (may work with other variations) - Select the 2024 Barbarian and then pick Path of the Ancestral Guardian as a template. It let me do it with no error, AND it stayed 2024 version. For some reason when I tried a Path of the Beast template with this method before it defaulted back to 2014.

Having this issue with every class, with every method, on every platform, and with every browser. WTH? 

Support Ticket did nothing. 

having the same issue as of yesterday- i can't make a new homebrew for any class from either 5e, externals, or OneD&D without the zombie beholder error popping up.

What the hell happened? I can no longer create any subclass, the beholder error keeps popping up. WTF

UPDATE: Okay, so I seem to be able to create a subclass after modifying an existing subclass only. NOTE: I'm using legacy (2014) classes. 

from my testing this seems to be the only thing that works. trying to make any subclass from scratch gives an error.

Thanks it finally started working for me

Creating a Barbarian Subclass from scratch now works! Basing it off the template doesn't work (internal server error 500), but I will take what I can get!!

Quote from spamandtuna >>

Yeah, the barb subclass templates are a separate issue, but the devs are aware.

 I am still getting zombie beholder error issue with Barbarian subclasses.