A 404 Method Not Found error when creating an enterprise search datastore via REST API usually indicates incorrect endpoint usage, missing permissions, or API version mismatches rather than a system-wide issue.
Here is the code snippet you can refer to:

In the above code we are using the following key points:
- Sends a POST Request to Create a Datastore via REST API.
- Handles a 404 Error by Suggesting URL, Method, or Permission Fixes.
- Includes Authentication via Bearer Token for API access.
- Validates Response Codes Dynamically to detect other issues.
- Provides Debugging Insights to resolve API misconfigurations.
Hence, a 404 Method Not Found error is typically due to incorrect API usage, requiring verification of endpoint URLs, HTTP methods, and user permissions to resolve the issue.