Oopsi!

Name: Oopsi!
Price: 8 EUR
Author: Humble

A modpack including the most, useful, beautiful, optimized, friendly Mods. made for everyday use. based on SOP

by Humble

294 Downloads

0 Followers

fabricMC 1.21.11lightweightmultiplayeroptimization

Rent Oopsi! Server

Screenshots

In built version switcher to play on old servers! (even bedrock)

About this Modpack

Hey there!
This modpack might be bit different from what you might normally think of as a modpack. It’s made to be used clientside, (you can use it on any server without the server needing the mods installed).

Remember when you looked at minecraft and said "Man, i wish i could have both features and preformance."

Yeah, me neither ;P

Anyways, here it is! a modpack that is both optimized and feature rich.
It's packed with QOL goodies, that all work on the clientside.

based on SO. we add our own QOL and performance mods.
I brand this as your everyday modpack.
Why?

= I make sure the mods don’t change the vanilla experience much.
= I make sure all mods are useful.
= I make sure none of the mods are privacy invasive
= The modpack is heavily optimized (thanks to Simply Optimized for inspiring some of the mod choices!).
= The mods are customizable feel free to remove or tweak anything to your liking.
= I’m not money incentivized, no sponsors, no bs like “FeAtUreD SeRvErS”.

I’m not sure what else to write… just YOLO it! <:

Available Versions

Oopsi! 1.21.11-3.1.2release

MC 1.21.11fabric163 downloads

February 12, 2026

Oopsi!release

MC 1.21.10fabric78 downloads

November 15, 2025

How to Set Up a Oopsi! Server

Order Server

Choose at least 4 GB RAM (6 GB recommended for Oopsi!). Based on player count: per 8 players.

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "Oopsi!" and click "Install". The fabric loader and Minecraft 1.21.11 are configured automatically.

Start Server & Play

Start the server – all mods are loaded automatically. Share the server IP with friends and play together!

Frequently Asked Questions

Oopsi! server crashes or won't start – what to do?

Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 6 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.

How much RAM does a Oopsi! server really need?

Minimum 4 GB, recommended 6 GB for stable performance. per 8 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €8/month).

Can I add custom mods to Oopsi! without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.11). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.

Oopsi! server lagging – performance tips

1) Increase RAM to 6 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.