This is a visual error; keep it running and it'll hit 100% soon!
This is a visual error (you may have been stuck at 33% in the past for a similar issue), and the game is still patching.
We've pushed our loyal little client to its limits, but it's built on old, outdated tech--it just isn't designed to support the things we want to do for League's future. The client update is a from-the-ground-up rework of League's home.
Its wings are too small to get its fat little body off the ground.
Submit your logs by creating a ticket, and let us know the details about where your performance is suffering the most.
If you uninstall or reinstall the updated client, you may experience more frequent bug splats.
So, for example, first errors are met with 5 strokes on the bare soles, then 10 (or, my preference, place a rubber band around the foot and snap it against the sole: pure pain, safe, and measurable).
Third error might bring "now the thighs, 10 strokes...." and so on through back, breasts, perhaps belly. I totally agree with any producer/distributor that decides to go "digital only".