Hey there @12edea2994ea4730ac3a5c9d30b8b170! Welcome back to the community! There are a couple possible fixes in this thread though no universal fix as this can occur from limited drive space, corrupted installation, incorrect drive type, or even special characters inside the file path.
Which version of Unreal are you using?
Do other versions of the engine/plugin work appropriately?
May I know your Operating System/Specs?