We are aware of a number of commands that may not provide enough information when an error occurs, and in some cases may not provide any information at all. Please let the team know of any you discover and we will confirm whether they are already on the roadmap for improvement.
If you experience a problem with a command, particularly with any commands that provide no output at all, say unexpected error, or timeout then retry the command with --debug and please report what is printed to your terminal.
Here is an example of adding a blueprint to the simulator using the --debug option:
dxp datastore simulator add --blueprint /path/to/api.yaml --debug