There's been quite a lot of instances of this issue occurring. To help resolve the issue as best as possible, if/when your game shows this error, please collect the dump file **while the game is still running** and provide it here. To generate a dump file:
> - Start Task Manager
- Find "League of Legends (32 bit)" under the Background processes section (not Apps section) on the Processes tab
- Right click it and select create dump file. This will create the dump and tell you where it is stored (you can copy+paste that file path)
- Find the file (will be a DMP File type) and reduce its size by Right click > Send To > Compressed (zipped) folder
- Upload this compressed file to a google drive and share here. Alternatively, you can open a support ticket and attach the file to the ticket.