To stay safe, only download NEU from the Official GitHub or use the version built directly into the Lunar Client launcher.
The filename is a major red flag and is almost certainly malicious software (malware) designed to steal your Minecraft or Discord account . NotEnoughUpdates-2.1-lunar (1).jar
Have you already this file on your computer? Releases · Moulberry/NotEnoughUpdates - GitHub To stay safe, only download NEU from the
Lunar Client already includes official NEU support built-in. You do not need to download a separate ".jar" file specifically for Lunar. To stay safe