--- title: "Fix common OptiScaler errors | OptiScaler" description: "Troubleshoot OptiScaler not working, missing overlay, startup crashes, wrong output selection, and configuration conflicts with a step-by-step process." canonical: https://optiscaler.ink/guides/fix-common-errors updated: 2026-10-18 --- # OptiScaler not working? Fix common errors and overlay problems Troubleshoot OptiScaler not working, missing overlay, startup crashes, wrong output selection, and configuration conflicts with a step-by-step process. ## Facts (2026-10-18) - **Version:** OptiScaler 0.9.4 (reference build, July 2026) - **APIs:** DirectX 11, DirectX 12, Vulkan - **Upscalers:** DLSS, FSR and XeSS inputs/outputs where compatible - **Frame generation:** Experimental OptiFG (DirectX 12) - **Overlay:** Insert key - **Install:** ZIP extracted next to the main game executable - **Platform:** Windows; Linux via Proton/Wine varies - **Site:** Independent guide — not the official project site ## In short Troubleshoot OptiScaler not working, missing overlay, startup crashes, wrong output selection, and configuration conflicts with a step-by-step process. ## Steps 1. Remove the added files and confirm the game runs stock again. 2. Re-check the executable folder and the proxy DLL name. 3. Check for overlay and input-hook conflicts. 4. Re-install the minimum configuration and test one output. ## Facts that do not change Reference build is OptiScaler 0.9.4. Install is a ZIP next to the main game executable; the overlay opens with Insert. Avoid online or anti-cheat protected games, and test offline first. ## Errors and fixes: related searches - [OptiScaler Not Working](https://optiscaler.ink/keywords/optiscaler-not-working) - [OptiScaler Not Working Fix](https://optiscaler.ink/keywords/optiscaler-not-working-fix) - [OptiScaler Errors](https://optiscaler.ink/keywords/optiscaler-errors) - [OptiScaler Common Errors](https://optiscaler.ink/keywords/optiscaler-common-errors) - [OptiScaler Troubleshooting](https://optiscaler.ink/keywords/optiscaler-troubleshooting) - [OptiScaler Game Does Not Launch](https://optiscaler.ink/keywords/optiscaler-game-does-not-launch) - [OptiScaler Game Not Launching after Install](https://optiscaler.ink/keywords/optiscaler-game-not-launching-after-install) - [OptiScaler Crash](https://optiscaler.ink/keywords/optiscaler-crash) - [OptiScaler Crash Fix](https://optiscaler.ink/keywords/optiscaler-crash-fix) - [OptiScaler Game Crash after Install](https://optiscaler.ink/keywords/optiscaler-game-crash-after-install) - [Why Does a Game Crash after OptiScaler Install?](https://optiscaler.ink/keywords/why-does-a-game-crash-after-optiscaler-install) - [OptiScaler Crash on Startup](https://optiscaler.ink/keywords/optiscaler-crash-on-startup) - [OptiScaler Wrong Output](https://optiscaler.ink/keywords/optiscaler-wrong-output) - [OptiScaler Output Looks Wrong](https://optiscaler.ink/keywords/optiscaler-output-looks-wrong) - [OptiScaler Fallback Output](https://optiscaler.ink/keywords/optiscaler-fallback-output) - [OptiScaler Wrong Backend Active](https://optiscaler.ink/keywords/optiscaler-wrong-backend-active) - [OptiScaler Configuration Conflicts](https://optiscaler.ink/keywords/optiscaler-configuration-conflicts) - [OptiScaler Old INI Settings](https://optiscaler.ink/keywords/optiscaler-old-ini-settings) - [OptiScaler Stopped Working after Update](https://optiscaler.ink/keywords/optiscaler-stopped-working-after-update) - [OptiScaler Wrong Proxy DLL](https://optiscaler.ink/keywords/optiscaler-wrong-proxy-dll) - [OptiScaler Wrong Game Folder](https://optiscaler.ink/keywords/optiscaler-wrong-game-folder) - [OptiScaler Crash after Install 0.9.4](https://optiscaler.ink/keywords/optiscaler-crash-after-install-0-9-4) - [OptiScaler Game Crash after Install 0.9.4](https://optiscaler.ink/keywords/optiscaler-game-crash-after-install-0-9-4) - [Why Does a Game Crash after OptiScaler Install 0.9.4?](https://optiscaler.ink/keywords/why-does-a-game-crash-after-optiscaler-install-0-9-4) - [OptiScaler Crash after Install Linux](https://optiscaler.ink/keywords/optiscaler-crash-after-install-linux) - [OptiScaler Game Crash after Install Linux](https://optiscaler.ink/keywords/optiscaler-game-crash-after-install-linux) - [OptiScaler How to Crash after Install](https://optiscaler.ink/keywords/optiscaler-how-to-crash-after-install) - [OptiScaler How to Game Crash after Install](https://optiscaler.ink/keywords/optiscaler-how-to-game-crash-after-install) - [Why Does a Game Crash after OptiScaler Install Linux?](https://optiscaler.ink/keywords/why-does-a-game-crash-after-optiscaler-install-linux) - [OptiScaler Game Not Launching after Install 0.9.4](https://optiscaler.ink/keywords/optiscaler-game-not-launching-after-install-0-9-4) - [OptiScaler Best Crash after Install](https://optiscaler.ink/keywords/optiscaler-best-crash-after-install) - [OptiScaler Best Game Crash after Install](https://optiscaler.ink/keywords/optiscaler-best-game-crash-after-install) ## FAQ ### What is OptiScaler? OptiScaler is a community tool that can intercept supported in-game upscaler calls and redirect them to another supported upscaling backend, with additional tuning options. ### How does OptiScaler work in a game? The game exposes an input upscaler, OptiScaler sits between the game and the selected output backend, and the chosen output handles the final upscaling path where compatibility allows. ### Does OptiScaler support DirectX 11? Yes, DirectX 11 is supported, although the available output methods and behavior can differ from DirectX 12. ### Does OptiScaler support DirectX 12? Yes. DirectX 12 has broad support and is also the API used by experimental OptiFG functionality. ## Related - [OptiScaler guides: install, FSR4, Linux, performance and safety](https://optiscaler.ink/guides) - [OptiScaler FAQ: the official 20 questions, answered](https://optiscaler.ink/faq) - [OptiScaler install guide: clean setup from start to finish](https://optiscaler.ink/guides/install-optiscaler-clean-setup) - [How OptiScaler works: input, output and overlay explained](https://optiscaler.ink/guides/how-optiscaler-works-input-output) - [OptiScaler compatibility guide for DirectX 11, DirectX 12 and Vulkan](https://optiscaler.ink/guides/compatibility-dx11-dx12-vulkan) ## Download ZIP next to the game executable: [Download OptiScaler](https://optiscaler.ink/download) Markdown mirror: https://optiscaler.ink/guides/fix-common-errors.md