Error "invalid_client_id" Apex SDK

Affected: Apex server-side SDK

Symptoms

Both of the following error occurs when running the bridge:

Salesforce auth failure: 400{"error":"invalid_client_id","error_description":"client identifier invalid"}<nil>
Error running bridge: {"error":"invalid_client_id","error_description":"client identifier invalid"}

Cause

The OAUTH_ID environment variable is invalid.

Solution

Double-check that the OAUTH_ID environment variable is correct.