Sorry, I downloaded and used go version go1.23.0 windows/386 by mistake. I used echo %PROCESSOR_ARCHITECTURE% to check my CPU architecture as amd64. After I reinstalled the go language for amd64 and checked go env, my fuzzy query no longer reported this error. And it is consistent with the document results. Very important sentence: Go fuzzing with coverage instrumentation is only available on AMD64 and ARM64 architectures currently.