Sometimes the launcher gets confused by its own version files. You can force a refresh manually:
: Scroll down and click Repair . This won't delete your data.
How to Fix "Minecraft Launcher Error: Couldn't Load Launcher Core"
: Click the three dots (or right-click) and select Advanced Options .
Since the Minecraft Launcher relies heavily on the Xbox ecosystem, a hitch in "Gaming Services" can break everything.
If you're seeing the "Couldn't load launcher core" error, you're likely staring at a frustrating popup mentioning a missing launcher.dll or a "LoadErrorNotPresent" message. This error usually stems from corrupted game files or an update that didn't quite stick. 1. The "Reset and Repair" Trick