Getting a 406 Not Acceptable Error – What’s Causing It and How Do I Fix It? or Why Am I Seeing a 406

406 errors suck. Here’s what fixed it for me:

1. Look for mod_security rules tripping up (Apache).
2. If you’re using a framework (Django, Laravel), check middleware—might be altering headers.
3. Test with Postman to see if the error persists.

Sometimes it’s just a missing trailing slash in the URL. Weird, but true.