This version is FancyHolograms v2.10.0 but compiled with Java 21 instead of Java 25.

Only use this version, if you have to use 1.21.4 and/or Java 21. We highly recommend to update to the latest supported Paper version (21.1.2 atm) and Java 25.

This version also removed support for 26.1.2, as it requires Java 25.