One reason I propose is either
Failure to show prior effort to solve the problem
According to our guidelines for asking a good question, Server Fault should be the last stop in your quest for an answer, after you've exhausted other avenues of research.
A more well encompassed reason would be something like
This question does not meet the minimum requirements set by the community.
This question either shows a lack of prior research, lack of information, or otherwise does not meet the guidelines of how to ask a good question
This is only one suggestion, just two options for verbage.
