Getting errror on trying to submit the plugin on dev environment

Getting the error:

 [UPLOAD_FAIL] The plugin was not uploaded. The plugin package file not found.

On runnning 'li submit-plugin'/'li submit-plugin --force', on the dev env.

The server config file looks good, has the correct URL, and the upload token.
Also ran 'li package-plugin' --> created a plugin folder in the SDK; but still getting the same error.

Is this a known issue? Any help would be appreciated.