If you experience a "Critical Error" crash during loading, corrupted temporary files are often the culprit.
: Open the Riot Client , click your profile icon, go to Settings , select League of Legends, and click Repair . This checks for and fixes missing or corrupted game files. 3. Improving FPS & Reducing Lag Fix League of Legends All Error | Crashing, Fre...
: In the same Compatibility tab, check the box for "Disable full-screen optimizations" to prevent Windows overlays from causing freezes. If you experience a "Critical Error" crash during