Then compare against Meteor’s official release notes. Common mismatches:
Because the original developer repositories can change hands or become archived, ensure you are downloading the 1.21.1 port from a trusted community GitHub fork or the official Meteor Client Addon Marketplace Discord ecosystem. Avoid sketchy third-party "mod download" websites, as they often bundle malware. meteor rejects addon 1211
: Modules that exploit vehicle mechanics to move through blocks. Then compare against Meteor’s official release notes
Meteor stores a config file that remembers rejected addons. To reset: meteor rejects addon 1211