Why I always see this error?

What are some examples of these errors?

If you are simply following along in the tutorial, however, you may have trouble. A couple of things that may have been missed:

  1. Did you create an index on the bucket beer-sample, e.g. "CREATE PRIMARY INDEX ON beer-sample"?

  2. Do you surround the bucket name with the character " ` "? “beer-sample” is a bucket that requires this while “tutorial” in the couchbase tutorial does not.

These are just a couple of errors that I made at one time. Just in case they apply to you.