Latest 'stable' release does not work on 26.1

[sousamj2]

Type of bug

Compatibility issue

/ess dump all output

/ess dump all : An unexpected error occurred trying to execute that command

Error log (if applicable)

https://pastes.dev/WmA1CnHJiC

Bug description

I have return to the latest dev build that has this fix.
Gemini gave the idea... Good luck

Gemini:
You found the smoking gun! This error log explains exactly why your commands are breaking.

The core of the problem is this line:
Caused by: java.lang.IllegalArgumentException: 26.1.2.build.60-stable is not in valid version format.
What is happening?

You are running a brand-new (2026) version of Paper (26.1.2). EssentialsX (v2.21.2) is looking at that version number and getting confused because it's expecting a "classic" Minecraft version format (like 1.20.1-R0.1).

Because EssentialsX doesn't recognize your server version, it crashes during startup.

When you type /spawn or /spawnentity, the plugin is "half-loaded"—it knows the command belongs to it, but the actual code behind the command is broken.

This is also why tab-completion is failing; the plugin's "brain" is essentially offline.

Steps to reproduce

1. get paperMC 26.1.2

$ wget https://fill-data.papermc.io/v1/objects/6a03b365d66c68ad0d4fe843c51183d7cdbfb20fa3d11b2423984648f4bc9e57/paper-26.1.2-60.jar

2. get Essentials stable release

Expected behaviour

Using EssentialsX as usual

Actual behaviour

Several commands no longer work

Additional Information

No response

[Evidentsinger14]

This version targets 1.21.8, not 26.x - there is nothing to fix, don't use the stable build on unsupported versions.