No error returned by the Gcr.SystemPrompt is suitable for display or
to the user.
If the system prompter can only show one prompt at a time, and there is
already a prompt being displayed, and the timeout waiting to open the
prompt expires, then Gcr.SystemPromptError.SYSTEM_PROMPT_IN_PROGRESS is returned.
No error returned by the Gcr.SystemPrompt is suitable for display or to the user.
If the system prompter can only show one prompt at a time, and there is already a prompt being displayed, and the timeout waiting to open the prompt expires, then Gcr.SystemPromptError.SYSTEM_PROMPT_IN_PROGRESS is returned.