The following issue occurs when using a freshly downloaded copy of Optifine 1.8.9.
https://paaster.io/68c56a389e9541dc1873c528#tgHZvRimjpOOBoZl7HB4fU8EPFZ_uA3vYegPSjYgKvU
EDIT: Updated link
I have tried using a 1.8.8 freshly downloaded version and an actual extracted version. Neither of them fix this issue.
I once got the following message and the issue went away with the fresh copy downloaded the same day. But again, the issue still persists and the window hasn't popped up again.
