no official Eaglercraft 1.21.4 download link , as a full port of that version does not currently exist. The most recent stable official release remains Eaglercraft 1.8.8 currently under active development. Eaglercraft
While some community members have claimed to create 1.21 ports, these are often feature-ports eaglercraft 121 4 download link
For the most reliable offline experience, you can download the .html packages directly from the Eaglercraft Downloads page . no official Eaglercraft 1