Recently trying stats in search (Preview) but it seems not working on our end. Tried the sample in documentation.
Stats in search not working
+5I tested your search and it worked for me. I then disabled the statistical search feature on my tenant and got the same error message. So, I recommend that you reach out to your Google SecOps rep and ask that they enable the feature for your tenant. Since it is in preview, it is not generally available on all tenants.
With feature enabled
With feature disabled
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