CompletionContributor not working when typed slash?

I want to implement automatic code prompt API path for entering slashes, but when I input / it does not trigger code prompts. 

```

public PathCompletionContributor() {
    CompletionProvider<CompletionParameters> provider = new DefaultCompletionProvider();
    this.extend(CompletionType.BASIC, psiElement(), provider);
}

<completion.contributor language="any" order="first" implementationClass="io.apicopilot.editor.PathCompletionContributor"/>

```