Edit (04/19/2022):
Hello @Chu_chun! : )
I’ve released a packaged ver. on GitHub with installation instructions.
Try install following these steps: Release AMD FidelityFX Super Resolution 1.0 - UE5 Adapted ver. · lucoiso/fsr-amd-ue (github.com)
When installing the plugin inside the “Runtime” folder as AMD says, you will get this error, so I recommend installing it inside the “Marketplace” folder.