The error messages tell you what the specific criteria are just to be able to post the question and get past the automated checks. But that is not enough. Your title should:
- be a question (usually)
- include enough information for an answerer to be confident they can answer just from reading the title (or a later searcher to know your problem is their problem too)
- not artificially include tags like language names
- Summarize the actual problem you're having (what specifically is not working?)
- Not include irrelevant information like Urgent or Beginner
Here are bad titles (I have seen these in the wild):
- Ridiculous Error Message from Doing Something Reasonable
- Is There a Better Way to Do This?
- What Causes This?
- Any Help Please It's Urgent Deadline Tomorrow
Looking at bad titles makes it easier to write good ones. And of course, when you get an error message, read it. If your title is rejected because it contains a forbidden word or is identical to another title, the message will tell you what you need to fix.