TL;DR
To resolve your issue, store your OAUth credentials as environmental variables.
E.g. in debian et al., export BOSCH_CLIENT_ID=... etc., then start the dashboard in the same terminal.
Context
I was about to ask the same question, as I got the same error message no matter how I referenced the config.json file (relative path, absolute path, no reference, etc.).
For clarification, the tutorial pointing to a config.json resource for storing OAuth credentials is here.
Quoting:
While the dependencies are being installed, create the config.json file and insert client_id, secret and scope from your Already created
OAuth2 Client. The content of the file has to look like this:
{
"client_id": "<YOUR_CLIENT_ID>",
"client_secret": "<YOUR_CLIENT_SECRET",
"scope": "<YOUR_SCOPE>",
"intervalMS": 10000
}
The reference to the config.json file has been removed from the README.md resource in the vorto-dashboard module of vorto-examples.
The latest README.md suggests providing the OAuth credentials through environmental variables:
You can provide your OAuth2 credentials through environment variables.
The three environment variables you have to provide are:
BOSCH_CLIENT_ID
BOSCH_CLIENT_SECRET
BOSCH_SCOPE
[...]
Looking at the source, I can only find an explicit reference to a config.json in the start script entry for package_for_deployment.json (nor anything around the source seems to be consuming, say, argv[2] for that matter).
The AuthToken.js resource in charge of handling OAuth credentials only seems to reference environmental variables through the process.env.[...] references.
Elaboration
This is only speculation at the time of writing, but I suspect the reason why the config.json methodology has been abandoned might have something to do with strengthening security, i.e. not storing OAuth credentials permanently in a file.
If that much is true, then the tutorial page should probably be amended with the latest instructions from the README.md.
