<https://forums.minecraftforge.net/topic/102611-when-i-enter-the-game-with-forge-the-error-appears-without-forge-the-game-works-normally-my-game-version-is-117/#comment-460883>
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"should be the problem! \n\tquote by diesieben07: \"Optifine is not at all compatible with Forge on 1.17 yet.\"\n \n"
<https://forums.minecraftforge.net/topic/102611-when-i-enter-the-game-with-forge-the-error-appears-without-forge-the-game-works-normally-my-game-version-is-117/?tab=comments#comment-460832>