To given an update here after debugging this. It turned out the server is just very slow to respond sometimes due to disk I/O being slow. There is no real solution besides increasing timeouts, which may cause all kinds of other side-effects.

The error reporting inside the minecraft admin webui could be improved to give more indication besides internal server error though, have to see when I find time for this though.

@madrush
That's wholesome ♥
Always happy to help.

@atrilahiji Cool, thanks. I haven't done much with it, but actually have been keeping on eye on this top in case someone resurrects it. Thank you!

@girish how do we mass adjust 50+ apps? 😉

@murgero Oh nice! Yeah I'd like to run this. I know people who have Java edition and people who have bedrock and I'd like to host a server where they can all play together.

Hey @Mazekien

minecraft server and minecraft client can have diferent mod or having just on one side, but you need to check on compatibility.

You can find 3 kind of mod type:

Forge based Fabric based Vanilla Datapack

Forge and Fabric are incompatible, but you can use Fabric/Forge mod with Vanilla Datapack.
Optifine is a alternative graphic engine for Minecraft that most of the shaders are made for.

Optifine is not compatible with fabric, but can be load in to Vanilla Minecraft or Forge Minecraft.

Cloudron support just Vanilla Datapack, not any other mod loader (forge or fabric) but been Optifine Client-Only it will work.
But if u wont to add mod that you find on Curse/Twitch you need to w8 later September we will release some version of minecraft apps for cloudron that support Forge/Fabric mod.

@Trankery Yup, I will mark this as a feature request for a future release.